人教版（2019） 必修 第三册Unit1 Festivals and Celebrations Period 5 Reading for Writing 综合练习（含答案）
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Unit 1
●Ⅰ 单词拼写
FESTIVALS AND CELEBRATIONS
Period 5 Reading for Writing
基础巩固
1.She gave us a b description of what happened during her trip in Africa. 2.After the song ended, all c and begged for another.
3.She has the natural g of a born dancer.
4.A car drew up outside and a few m later the doorbell rang.
5.The Hanjiang River is the longest b of the Yangtze River.
6.Corn and cotton are widely grown in this (地区).
7.Her ambition is to (代表) her country at the Winter Olympics.
8.It is very difficult to cross the desert by car, but not (绝对地) impossible.
9.My parents always remind us that by no means should we show no (尊重) for our teachers.
10.We always celebrate our (婚礼) anniversary with a bottle of champagne. ●Ⅱ 单句填空
1. (represent) our school, we took part in the English Speech Contest last year. 2.I think I must be doing something (horrible) wrong, but I don't know what it is. 3.We are (please) with the rapid progress we have made in every field of study. 4.We were attracted by the (amaze) performance of the Polynesian dancers. 5.A crowd of people ran down the street (wave) their arms in the air.
6.The moment he was waving the national flag in space made us feel more proud of our great country.
7.Our teacher has given us some advice that is well worth (consider). 8.The band played a familiar tune which had everyone (clap) along.
9.The bank has three (branch) in Norwich, and over three hundred countrywide. 10.I fancy (go) to the cinema with my parents tomorrow.
●Ⅲ 短语填空
1.Having said farewell to their friends,they (出发,动身,启程) for home. 2.She teaches the students to (尊重) different races.
3. (第一次) in his life he regretted that he had no faith.
4.The little boy was so fond of the toy car that he couldn't (把视线移 开) it.
5.The north and south of the country (被……分开) a mountain range.
6.The peak of the celebration activities ( 适逢) New Year's Eve and the day after.
7.Since 1896 the Olympics have been held every four years, (除了) breaks during the years of the two world wars.
8.There is no denying that traditional Chinese festivals (在…… 中扮演 重要角色) spreading traditional Chinese culture.
9.Then the fire alarm (爆炸). I just grabbed my clothes and ran out. 10. (坦白说,坦率地说) with you, I've been out of touch with most of my old friends.
●Ⅳ 补全句子
1.When a pencil is partly in a glass of water, it looks .(as if 引导的虚拟语气)
当一支铅笔的一部分置于水中时,它看起来就像被折断了一样。
2.They had marched 5 kilometres, after reaching their camp. (分词作状语)
他们已经走了 5 公里,到达营地后感到疲惫不堪。
3.The girl has a gift for dance. (v.-ing 形式作定语) 那个在舞台上表演的女孩有舞蹈天赋。
4. is very important for us to learn a foreign language. (v.-ing 短语作主语)
大声朗读对我们学习外语非常重要。
5.We'd better leave things until the police arrive. (just as 引导的状
语从句)
在警察到来之前,我们最好让事物保持原样。
多维训练
A
The day after Thanksgiving is the start of the holiday shopping season.Thanksgiving is always on a Thursday, so the day after is a Friday.This day has come to be known as Black Friday.It has been the busiest shopping day of the year since 2005.
Most stores offer great deals on Black Friday.They open their doors very early in the morning.They try to attract shoppers with big discounts.Some products like TVs are much cheaper than usual.Stores may even lose money on these products.They hope that shoppers will buy gifts for other people while they are in the store.
Black Friday is a great time to get good deals.The problem is that there are not enough low-priced products to go around. Each store may only have a few.People stand in long lines to get such great deals ，but not everyone who wants one will get one.Some people look crestfallen as they leave.
Some Black Friday events have been violent.Large crowds have trampled ( 踩 踏 )workers.Fights have broken out over toys or people cutting in line.But most Black Friday events are safe and fun.Still, if you plan on going ，expect large crowds.
The name “Black Friday” was first used in Philadelphia in the 1950s.Police officers called this day Black Friday because of the heavy traffic it drew.In the 1960s，stores tried to rename the day “Big Friday”．It did not stick.The name“Black Friday”continued to be used across the country.It seems that it is here to stay.
Now people all over the country take part in Black Friday.It is even spreading to other parts of the world.Stores have held Black Friday events in the UK, Australia, and Brazil since 2012.In Costa Rica Black Friday is known as “Viernes Negro”．
1 ．Why do some stores sell TVs at low prices
A ．They are short of money.
B ．They want to sell out old products.
C ．They want people to buy other things.
D ．They want people to enjoy their shopping.
2 ．What does the underlined word “crestfallen” in paragraph 3 probably mean
A ．Disappointed. B ．Confused.
C ．Surprised. D ．Excited.
3 ．How did the first Black Friday get its name
A ．It led to violent events.
B ．It caused a lot of traffic.
C ．It attracted large crowds.
D ．It wasted too much money.
4 ．What does the last paragraph say about Black Friday
A ．It has been celebrated as an old tradition.
B ．It is a national holiday of the United States.
C ．It has become an international shopping holiday.
D ．It is called “Viernes Negro” in the English world.
B
Imagine a drive, a thousand miles long with no turns ，across a vast plain(平原) with repeated scenery ，and hundreds of kilometers between towns and service stations.That's Eyre Highway ，the road that connects Western Australia to Southern Australia through the Nullarbor Plain, a flat and treeless land of 200，000 square kilometers in area.With no hills or lakes in the way, the highway was laid down as a straight road that runs for 1 ，675 km.
Eyre Highway can be best described as a long and lonely road.While in the East you still find some towns, the western three quarters is almost without life.Spread throughout the length of the highway at about 200 km to 300 km apart are roadhouses providing basic services such as fuel (燃 料)，food and drink，places to stay，and repairs，but not all are open 24 hours.Because it's far away from places where people live, some parts of the highway serve as emergency airstrips (紧急飞机跑 道) for the Royal Flying Doctor Service.
The first European to cross the Nullarbor Plain was English explorer Edward John Eyre in June 1841.He experienced much hardship and survived the year-long journey by eating lizards (蜥蜴) and getting water from roots.Eyre's successful crossing encouraged many to follow in his footsteps ， including Arthur Charles Jeston Richardson, who became the first cyclist to cross the Plain in 31 days in 1896.
The building of Eyre Highway started in July 1941, exactly a hundred years after Edward John Eyre's great achievement ，and was completed six months later.Along the way you will meet the Dingo Fence (栅栏) ，the longest fence in the world.Other places of interest along the way include Newman and Afghan Rocks ， the Eyre Bird Observatory, the view from Madura Pass, several sinkholes and blowholes, to mention just a few.
5 ．What can you see along Eyre Highway
A ．High hills. B ．Large lakes.
C ．Lots of turns. D ．A great plain.
6 ．What can we learn from paragraph 2
A ．Airplanes cannot land on Eyre Highway.
B ．You can spend the night along Eyre Highway.
C ．You can refuel whenever you see roadhouses.
D ．20 roadhouses spread through Eyre Highway.
7 ．How does paragraph 3 mainly develop
A ．By providing examples.
B ．By making comparisons.
C ．By presenting research findings.
D ．By following the order of time.
8 ．In which part of a magazine may the text appear
A ．Travel. B ．Nature.
C ．Technology. D ．History.
C
Like clockwork, nearly every fourth February includes one extra day. February 29th, otherwise known as Leap Day, isn't exactly a holiday. Instead, it's there to keep your calendar consistent with the earth's rotation (旋转) around the sun.
According to History. com, Roman emperor Julius Caesar is the “father ” of Leap Year. Until
he came along, people had used a 355 day calendar, which was 10.25 days shorter than the solar year. Roman officials were supposed to add an extra month every now and then to keep the seasons exactly where they should be. But that didn't work out all that well. When special occasions started shifting into different seasons around 45 BCE, Caesar consulted with astronomers and decreed (下令) that the empire should use a 12-month, 365-day calendar, which he named after himself. Caesar's Julian calendar included a Leap Day every four years.
Though Leap Day keeps your calendar in line with the earth's rotation around the sun, it causes a different kind of problem for leapsters. When should these February 29th babies celebrate their birthdays during the other three-quarters of their lives？Some party on February 28th, while others prefer a two day celebration that spans the last day of February and the first day of March.
Leap Day can be a nuisance in the legal system. In 2006, a court in Massachusetts was deciding whether criminal John Melo could be released a day early since his 10 year sentence included a Leap Day. In the case, the judge decided that since the man was sentenced to prison for years, not days, Leap Day didn't make a bit of difference.
Though a few timekeepers have pushed for calendars that don't include Leap Day, almost all astronomers and societies agree that Leap Day is the best method to keep the calendar on track.
9 ．Why was Leap Day created
A ．To celebrate special occasions.
B ．To honor Emperor Julius Caesar.
C ．To keep pace with the solar year.
D ．To keep track of all the seasons.
10 ．What is the problem with the birthday celebration of February 29th babies
A ．It is sometimes delayed.
B ．It lasts at least two days.
C ．It has to be held every other year.
D ．It may take place on different dates.
11 ．What does the underlined word “nuisance” in paragraph 4 mean
A ．Joke. B ．Topic.
C ．Trouble. D ．Mistake.
12 ．What is the attitude of most astronomers towards Leap Day
A ．Critical. B ．Supportive.
C ．Doubtful. D ．Cautious.
参考答案：
Ⅰ . 1.brief 2.clapped 3.grace 4.moments 5.branch
6.region 7.represent 8.absolutely 9.respect 10.wedding
Ⅱ . 1.Representing 2.horribly 3.pleased 4.amazing 5.waving 6.when 7.considering
8.clapping
9.branches 10.going
Ⅲ . 1.set off 2.show respect to 3.For the first time
4.take his eyes off 5.are separated by 6.falls on
7.except for 8.play a significant role in 9.went off
10.To be frank
Ⅳ .1.as if it were broken 2.feeling really tired
3.performing on stage 4.Reading aloud
5.just as they are
【解题导语】 文章介绍了一个重要的购物节日——“黑色星期五”。
1.C 解析：细节理解题。根据第二段中的“They hope that shoppers will buy gifts for other people while they are in the store.”可知，有些商店赔本卖电视是希望顾客能够买其他产品。2.A 解析：词义猜测题。根据第三段中的“but not everyone who wants one will get one”可 知，没有买到廉价商品的顾客只能失望地离开。
3.B 解析：细节理解题。根据第五段中的“Police officers called this day Black Friday because of the heavy traffic it drew.”可知， “黑色星期五”的命名与那天的交通拥堵有关。
4.C 解析：推理判断题。根据最后一段可知， “黑色星期五”已经成了一个国际购物节。
【解题导语】 文章介绍了澳大利亚的艾尔公路。
5.D 解析：细节理解题。由第一段中的“That's Eyre Highway，the road that connects Western Australia to Southern Australia through the Nullarbor Plain, a flat and treeless land of 200 ，000 square kilometers in area. ”可知，艾尔公路沿途能看到一个大平原。
6.B 解析：细节理解题。由第二段中的“roadhouses providing basic services such as fuel (燃 料) ，food and drink, places to stay, and repairs, but not all are open 24 hours ”可知， 你可以在公路 旁的一些旅馆过夜。
7.D 解析：篇章结构题。由第三段中出现的 in June 1841 和 in 1896 可知，该段按照时间 顺序展开。
8.A 解析：文章出处题。本文介绍了澳大利亚的艾尔公路并推荐了沿途的景观，故最有 可能出现在杂志的旅游专题中。
【解题导语】 文章介绍了闰日的来历以及它所带来的一些生活中的趣事。
9.C 解析：细节理解题。根据第一段中的“Instead, it's there to keep your calendar consistent with the earth's rotation (旋转) around the sun. ”，第二段中的“Roman officials were supposed to add an extra month every now and then to keep the seasons exactly where they should be.”以及第三段 中的“Though Leap Day keeps your calendar in line with the earth's rotation around the sun”可知， 闰 日的产生是为了与太阳历保持一致。
10.D 解析：细节理解题 。根据第三段 中的“When should these February 29th babies celebrate their birthdays during the other three-quarters of their lives... the first day of March. ”可知， 在 2 月 29 日出生的人，有的是在 2 月 28 日庆祝生日， 也有一些人会在二月的最后一天和三 月的第一天进行一个为期两天的庆祝生日的活动。由此可知， 在这一天出生的人可能会在不同 的日期庆祝生日。
11.C 解析：词义猜测题。根据下文所列举的例子可知，在法律体系中闰日的出现可能会
带来一些麻烦。
12.B 解析：推理判断题。根据最后一段中的“almost all astronomers and societies agree that Leap Day is the best method to keep the calendar on track”可知，大多数天文学家是支持闰日的。
●Ⅰ 单词拼写
FESTIVALS AND CELEBRATIONS
Period 5 Reading for Writing
基础巩固
1.She gave us a b description of what happened during her trip in Africa. 2.After the song ended, all c and begged for another.
3.She has the natural g of a born dancer.
4.A car drew up outside and a few m later the doorbell rang.
5.The Hanjiang River is the longest b of the Yangtze River.
6.Corn and cotton are widely grown in this (地区).
7.Her ambition is to (代表) her country at the Winter Olympics.
8.It is very difficult to cross the desert by car, but not (绝对地) impossible.
9.My parents always remind us that by no means should we show no (尊重) for our teachers.
10.We always celebrate our (婚礼) anniversary with a bottle of champagne. ●Ⅱ 单句填空
1. (represent) our school, we took part in the English Speech Contest last year. 2.I think I must be doing something (horrible) wrong, but I don't know what it is. 3.We are (please) with the rapid progress we have made in every field of study. 4.We were attracted by the (amaze) performance of the Polynesian dancers. 5.A crowd of people ran down the street (wave) their arms in the air.
6.The moment he was waving the national flag in space made us feel more proud of our great country.
7.Our teacher has given us some advice that is well worth (consider). 8.The band played a familiar tune which had everyone (clap) along.
9.The bank has three (branch) in Norwich, and over three hundred countrywide. 10.I fancy (go) to the cinema with my parents tomorrow.
●Ⅲ 短语填空
1.Having said farewell to their friends,they (出发,动身,启程) for home. 2.She teaches the students to (尊重) different races.
3. (第一次) in his life he regretted that he had no faith.
4.The little boy was so fond of the toy car that he couldn't (把视线移 开) it.
5.The north and south of the country (被……分开) a mountain range.
6.The peak of the celebration activities ( 适逢) New Year's Eve and the day after.
7.Since 1896 the Olympics have been held every four years, (除了) breaks during the years of the two world wars.
8.There is no denying that traditional Chinese festivals (在…… 中扮演 重要角色) spreading traditional Chinese culture.
9.Then the fire alarm (爆炸). I just grabbed my clothes and ran out. 10. (坦白说,坦率地说) with you, I've been out of touch with most of my old friends.
●Ⅳ 补全句子
1.When a pencil is partly in a glass of water, it looks .(as if 引导的虚拟语气)
当一支铅笔的一部分置于水中时,它看起来就像被折断了一样。
2.They had marched 5 kilometres, after reaching their camp. (分词作状语)
他们已经走了 5 公里,到达营地后感到疲惫不堪。
3.The girl has a gift for dance. (v.-ing 形式作定语) 那个在舞台上表演的女孩有舞蹈天赋。
4. is very important for us to learn a foreign language. (v.-ing 短语作主语)
大声朗读对我们学习外语非常重要。
5.We'd better leave things until the police arrive. (just as 引导的状
语从句)
在警察到来之前,我们最好让事物保持原样。
多维训练
A
The day after Thanksgiving is the start of the holiday shopping season.Thanksgiving is always on a Thursday, so the day after is a Friday.This day has come to be known as Black Friday.It has been the busiest shopping day of the year since 2005.
Most stores offer great deals on Black Friday.They open their doors very early in the morning.They try to attract shoppers with big discounts.Some products like TVs are much cheaper than usual.Stores may even lose money on these products.They hope that shoppers will buy gifts for other people while they are in the store.
Black Friday is a great time to get good deals.The problem is that there are not enough low-priced products to go around. Each store may only have a few.People stand in long lines to get such great deals ，but not everyone who wants one will get one.Some people look crestfallen as they leave.
Some Black Friday events have been violent.Large crowds have trampled ( 踩 踏 )workers.Fights have broken out over toys or people cutting in line.But most Black Friday events are safe and fun.Still, if you plan on going ，expect large crowds.
The name “Black Friday” was first used in Philadelphia in the 1950s.Police officers called this day Black Friday because of the heavy traffic it drew.In the 1960s，stores tried to rename the day “Big Friday”．It did not stick.The name“Black Friday”continued to be used across the country.It seems that it is here to stay.
Now people all over the country take part in Black Friday.It is even spreading to other parts of the world.Stores have held Black Friday events in the UK, Australia, and Brazil since 2012.In Costa Rica Black Friday is known as “Viernes Negro”．
1 ．Why do some stores sell TVs at low prices
A ．They are short of money.
B ．They want to sell out old products.
C ．They want people to buy other things.
D ．They want people to enjoy their shopping.
2 ．What does the underlined word “crestfallen” in paragraph 3 probably mean
A ．Disappointed. B ．Confused.
C ．Surprised. D ．Excited.
3 ．How did the first Black Friday get its name
A ．It led to violent events.
B ．It caused a lot of traffic.
C ．It attracted large crowds.
D ．It wasted too much money.
4 ．What does the last paragraph say about Black Friday
A ．It has been celebrated as an old tradition.
B ．It is a national holiday of the United States.
C ．It has become an international shopping holiday.
D ．It is called “Viernes Negro” in the English world.
B
Imagine a drive, a thousand miles long with no turns ，across a vast plain(平原) with repeated scenery ，and hundreds of kilometers between towns and service stations.That's Eyre Highway ，the road that connects Western Australia to Southern Australia through the Nullarbor Plain, a flat and treeless land of 200，000 square kilometers in area.With no hills or lakes in the way, the highway was laid down as a straight road that runs for 1 ，675 km.
Eyre Highway can be best described as a long and lonely road.While in the East you still find some towns, the western three quarters is almost without life.Spread throughout the length of the highway at about 200 km to 300 km apart are roadhouses providing basic services such as fuel (燃 料)，food and drink，places to stay，and repairs，but not all are open 24 hours.Because it's far away from places where people live, some parts of the highway serve as emergency airstrips (紧急飞机跑 道) for the Royal Flying Doctor Service.
The first European to cross the Nullarbor Plain was English explorer Edward John Eyre in June 1841.He experienced much hardship and survived the year-long journey by eating lizards (蜥蜴) and getting water from roots.Eyre's successful crossing encouraged many to follow in his footsteps ， including Arthur Charles Jeston Richardson, who became the first cyclist to cross the Plain in 31 days in 1896.
The building of Eyre Highway started in July 1941, exactly a hundred years after Edward John Eyre's great achievement ，and was completed six months later.Along the way you will meet the Dingo Fence (栅栏) ，the longest fence in the world.Other places of interest along the way include Newman and Afghan Rocks ， the Eyre Bird Observatory, the view from Madura Pass, several sinkholes and blowholes, to mention just a few.
5 ．What can you see along Eyre Highway
A ．High hills. B ．Large lakes.
C ．Lots of turns. D ．A great plain.
6 ．What can we learn from paragraph 2
A ．Airplanes cannot land on Eyre Highway.
B ．You can spend the night along Eyre Highway.
C ．You can refuel whenever you see roadhouses.
D ．20 roadhouses spread through Eyre Highway.
7 ．How does paragraph 3 mainly develop
A ．By providing examples.
B ．By making comparisons.
C ．By presenting research findings.
D ．By following the order of time.
8 ．In which part of a magazine may the text appear
A ．Travel. B ．Nature.
C ．Technology. D ．History.
C
Like clockwork, nearly every fourth February includes one extra day. February 29th, otherwise known as Leap Day, isn't exactly a holiday. Instead, it's there to keep your calendar consistent with the earth's rotation (旋转) around the sun.
According to History. com, Roman emperor Julius Caesar is the “father ” of Leap Year. Until
he came along, people had used a 355 day calendar, which was 10.25 days shorter than the solar year. Roman officials were supposed to add an extra month every now and then to keep the seasons exactly where they should be. But that didn't work out all that well. When special occasions started shifting into different seasons around 45 BCE, Caesar consulted with astronomers and decreed (下令) that the empire should use a 12-month, 365-day calendar, which he named after himself. Caesar's Julian calendar included a Leap Day every four years.
Though Leap Day keeps your calendar in line with the earth's rotation around the sun, it causes a different kind of problem for leapsters. When should these February 29th babies celebrate their birthdays during the other three-quarters of their lives？Some party on February 28th, while others prefer a two day celebration that spans the last day of February and the first day of March.
Leap Day can be a nuisance in the legal system. In 2006, a court in Massachusetts was deciding whether criminal John Melo could be released a day early since his 10 year sentence included a Leap Day. In the case, the judge decided that since the man was sentenced to prison for years, not days, Leap Day didn't make a bit of difference.
Though a few timekeepers have pushed for calendars that don't include Leap Day, almost all astronomers and societies agree that Leap Day is the best method to keep the calendar on track.
9 ．Why was Leap Day created
A ．To celebrate special occasions.
B ．To honor Emperor Julius Caesar.
C ．To keep pace with the solar year.
D ．To keep track of all the seasons.
10 ．What is the problem with the birthday celebration of February 29th babies
A ．It is sometimes delayed.
B ．It lasts at least two days.
C ．It has to be held every other year.
D ．It may take place on different dates.
11 ．What does the underlined word “nuisance” in paragraph 4 mean
A ．Joke. B ．Topic.
C ．Trouble. D ．Mistake.
12 ．What is the attitude of most astronomers towards Leap Day
A ．Critical. B ．Supportive.
C ．Doubtful. D ．Cautious.
参考答案：
Ⅰ . 1.brief 2.clapped 3.grace 4.moments 5.branch
6.region 7.represent 8.absolutely 9.respect 10.wedding
Ⅱ . 1.Representing 2.horribly 3.pleased 4.amazing 5.waving 6.when 7.considering
8.clapping
9.branches 10.going
Ⅲ . 1.set off 2.show respect to 3.For the first time
4.take his eyes off 5.are separated by 6.falls on
7.except for 8.play a significant role in 9.went off
10.To be frank
Ⅳ .1.as if it were broken 2.feeling really tired
3.performing on stage 4.Reading aloud
5.just as they are
【解题导语】 文章介绍了一个重要的购物节日——“黑色星期五”。
1.C 解析：细节理解题。根据第二段中的“They hope that shoppers will buy gifts for other people while they are in the store.”可知，有些商店赔本卖电视是希望顾客能够买其他产品。2.A 解析：词义猜测题。根据第三段中的“but not everyone who wants one will get one”可 知，没有买到廉价商品的顾客只能失望地离开。
3.B 解析：细节理解题。根据第五段中的“Police officers called this day Black Friday because of the heavy traffic it drew.”可知， “黑色星期五”的命名与那天的交通拥堵有关。
4.C 解析：推理判断题。根据最后一段可知， “黑色星期五”已经成了一个国际购物节。
【解题导语】 文章介绍了澳大利亚的艾尔公路。
5.D 解析：细节理解题。由第一段中的“That's Eyre Highway，the road that connects Western Australia to Southern Australia through the Nullarbor Plain, a flat and treeless land of 200 ，000 square kilometers in area. ”可知，艾尔公路沿途能看到一个大平原。
6.B 解析：细节理解题。由第二段中的“roadhouses providing basic services such as fuel (燃 料) ，food and drink, places to stay, and repairs, but not all are open 24 hours ”可知， 你可以在公路 旁的一些旅馆过夜。
7.D 解析：篇章结构题。由第三段中出现的 in June 1841 和 in 1896 可知，该段按照时间 顺序展开。
8.A 解析：文章出处题。本文介绍了澳大利亚的艾尔公路并推荐了沿途的景观，故最有 可能出现在杂志的旅游专题中。
【解题导语】 文章介绍了闰日的来历以及它所带来的一些生活中的趣事。
9.C 解析：细节理解题。根据第一段中的“Instead, it's there to keep your calendar consistent with the earth's rotation (旋转) around the sun. ”，第二段中的“Roman officials were supposed to add an extra month every now and then to keep the seasons exactly where they should be.”以及第三段 中的“Though Leap Day keeps your calendar in line with the earth's rotation around the sun”可知， 闰 日的产生是为了与太阳历保持一致。
10.D 解析：细节理解题 。根据第三段 中的“When should these February 29th babies celebrate their birthdays during the other three-quarters of their lives... the first day of March. ”可知， 在 2 月 29 日出生的人，有的是在 2 月 28 日庆祝生日， 也有一些人会在二月的最后一天和三 月的第一天进行一个为期两天的庆祝生日的活动。由此可知， 在这一天出生的人可能会在不同 的日期庆祝生日。
11.C 解析：词义猜测题。根据下文所列举的例子可知，在法律体系中闰日的出现可能会
带来一些麻烦。
12.B 解析：推理判断题。根据最后一段中的“almost all astronomers and societies agree that Leap Day is the best method to keep the calendar on track”可知，大多数天文学家是支持闰日的。