Unit 1 Asia 单元作业(一)
学校:___________姓名:___________班级:___________
一、单项选择
1.At 2 p. m. on March 27, 2022, people from the search and rescue team stood in ________ to mourn the 132 victims of the crashed MU5735 aircraft.
A.spirit B.silence C.service D.surprise
2.They asked me to go shopping with them. I don’t like shopping, so I went to the cinema ________.
A.instead B.instead of C.too D.either
3.You know, reading more good books can help ________ our characteristics.
A.shape B.create C.appear D.respect
4.All the tables were ________, so we had to wait for 30 minutes.
A.given away B.kept away C.taken up D.put up
5.The boy is dishonest. He always ________ some excuses for doing something wrong.
A.makes up B.sets up C.takes up D.picks up
6.Guilin is ________ city that there are many beautiful flowers ________ of the Lijiang River.
A.such a beautiful; on both sides B.so a beautiful; on the two sides
C.such a beautiful; on either sides D.so beautiful a; on all sides
7.— Do you want to go to Mochou Lake Park or Zhongshan Botanical Garden
—________. I would like to study at home.
A.All B.Both C.Either D.Neither
8.After three days’ hard work, all of us found ________ difficult but important to do the job on our own.
A.that B.that’s C.it D.this
9.Reading Corner in our school has made it ________ for us to experience the pleasure of reading than before.
A.easier B.easy C.easily D.more easily
10.—In the middle of Wuyue Square ________ a national flag last week.
—Yes. We got together there and watched the ________ of the national flag.
A.hanged, rise B.hanged, raising C.hung, raising D.hung, rising
二、完形填空
阅读下面短文,根据短文内容,从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。
A traveler was in a large desert, planning to walk across it in one month. Twenty more days passed, the journey had been going on ___11___. “Soon I’ll be able to walk out of this desert,” he thought gladly.
But the desert was never friendly to travelers. In a short time, there came a strong sandstorm. He hurriedly ___12___ his head with the clothes, prostrate on the sand. After about ten minutes, the sandstorm ___13___. He shook the clothes and stood up. At that moment, he found himself in a hopeless situation—the backpack with food and water was swept away by the ___14___.
As we know, it seems ___15___ to leave the desert without food and water. Luckily, he had a pear left. He held it in his hands tightly. “Not too bad, at least I have a pear. I believe I can walk out of the desert.”
Days and nights went by quickly, but the desert still looked endless. Besides, hunger, thirst and fear of ___16___ were always around him like ghosts, but each time he was close to losing hope, he forced himself to stare at the pear that he had been ___17___. “Not too bad, at least I have a pear.”
A small pear became the ___18___ for his survival. Three days later, ___19___ he saw a village not far away, he laughed with excitement. He felt completely relaxed—the “pear” brought him back to life. To keep hope is the best weapon(武器) for victory, so never tell you “___20___” because only if you try to search, you can always find a “pear” to pull you out of trouble.
11.A.well B.badly C.terribly D.heavily
12.A.played B.beat C.filled D.covered
13.A.began B.stopped C.hid D.continued
14.A.snow B.desert C.sandstorm D.smoke
15.A.right B.impossible C.safe D.important
16.A.death B.pain C.illness D.sand
17.A.smelling B.eating C.keeping D.imagining
18.A.hope B.rule C.question D.plan
19.A.unless B.until C.before D.when
20.A.anything B.nothing C.something D.everything
三、阅读理解
Red Tourism refers to visiting historical sites and places where we can see some records of China’s revolution led by the Communist Party of China from 1921 to 1949. It has become the top choice of many Chinese in recent years. Here we would like to introduce two popular red tourist cities.
★Yan’an, Shaanxi Yan’an is a holy land (圣地) of the Chinese revolution. The city has as many as 140 revolutionary sites, including the Wangjiaping Revolutionary, Fenghuang Mountain and Yangjialing Revolutionary sites. It also has a number of historical sites and buildings. It’s said to be the birthplace of the Chinese nation shown by the Yellow Emperor Mausoleum. Besides, Hukou Waterfall is only about a 2.5-hour drive from Yan’an.
★Zunyi, Guizhou Zunyi is famous for the site of Zunyi Meeting. The two-floor building is located at No.96 Ziyin Road. Now, people can visit the offices and rooms of several leaders at that time, including Zhou Enlai and Zhu De. There is also an exhibition hall, where people can see the weapons and objects used by China’s Red Army, and some sculptures related to China’s revolution.
21.Bob is interested in the birthplace of the Chinese nation, so he’d better visit ________.A.Hukou Waterfall B.Fenghuang Mountain
C.the site of Zunyi Meeting D.the Yellow Emperor Mausoleum
22.Which of the following may visitors expect to find in Zunyi EXCEPT ________
A.sculptures about China’s revolution B.objects used by China’s Red Army
C.photos of Hukou Waterfall D.rooms where the leaders lives
23.Where is the passage probably from
A.a map guide B.a travel magazine C.a travel diary D.a geography book
Imagine your home is in the center of a big circle. Everything you need is a 10-minute walk away. How convenient!
Recently, a group of architects(建筑师) from South Korea decided to make this a reality. They are planning a city with everything people need—including living areas, offices and entertainment(娱乐) areas—within a 10-minute walk from home.
When explaining why they wanted to build such a city, Ben van Berkel, a leader of company UNStudio, said people’s daily life experience is the most important. The “10-minute city” is so convenient that it won’t take people much time to travel elsewhere. “With time that is saved, more time is created,” Berkel told CNN.
The idea of such a city is not new. In 2016, French-Colombian researcher Carlos Moreno put forward the 15-minute city idea. The COVID-19 pandemic has made it more popular. During the pandemic, many people have been forced to spend most of their time at home, with less chance to go out of their communities.
Paloma Ezzet, 16, is an example. She said that before the pandemic, she liked to play soccer or go dancing. But during the pandemic, she had to give them up as no such entertainment areas or facilities(设备)were in her community. “It is gloomy, lonely and inconvenient,” Ezzet complained(抱怨).
But not everyone likes the idea. Some people say it would further concentrate(集中) wealth in the most convenient areas, resulting in high house prices. So, should people stop considering this idea
Maybe not. As Bobulescu, a French professor, said. “The seeds are there, and they’ll grow little by little.”
24.According to the article, which of the following is TRUE ________
A.A group of architects from France decided to make “10-minute city” a reality.
B.A group of architects are planning a city with only necessary things people need.
C.Paloma Ezzet couldn’t play soccer during the pandemic.
D.Everyone likes the idea of the “10-minute city”.
25.The meaning of the underlined phrase “put forward” is similar to ________.
A.come up with B.look forward to
C.carry on with D.agree with
26.What does the writer think about the idea of the “10-minute city” according to the last paragraph ________
A.Worried B.Doubtful C.Questionable D.Positive
A travel journal (日志) is one of the best ways to keep a long journey in memory. Many details that don’t seem important while you are writing your travel journal often turn out to be so memorable.
________. When you are on a busy journey, it is easy to forget to write. You may promise yourself that you will write later, but that almost never happens. Take a few minutes every day and put down your memories. It doesn’t have to be long, just on a regular basis (定期).
Use your “down time” for your travel journal. There is a surprising amount of sitting around while traveling. You can always put down a few lines in your travel journal when you are on trains, waiting for planes, drying your clothes or waiting in line.
________. They include the day, where you are, who you are with, maybe even the weather and what you eat. Years later when you read your journal, you will know exactly what you were doing on that day.
________. Listing facts is fine but that isn’t why you travelled. A long journey is a time for careful thoughts. Memories of these feelings disappear quickly with time. Writing about the experiences while the memories are fresh is important.
Keep ticket stubs (存根). Whenever you use a ticket for a train or a museum or a ride. Tape the stubs to your journal. They are pieces of history from your journey. Years later you can look at the ticket stubs and see exactly what you were doing on a specific day and how much it cost.
27.According to the ticket stubs, we can learn the following EXCEPT ________.
A.the costs of our trip B.our feelings at that time
C.the things we were doing D.the places we were visiting
28.What’s the writer’s main purpose of writing the passage
A.To advise us the ways to write a travel journal.
B.To explain the importance of keeping ticket stubs.
C.To tell us the activities that make the journey memorable.
D.To encourage us to have a long journey as often as possible.
29.What’s the correct order of the three missing sentences
1.Never forget to write about how you feel.
2.Get into the habit of writing your travel journal every day.
3.At the beginning, write down the first details people usually forget easily.
A.2→3→1 B.1→3→2 C.3→2→1 D.2→1→3
四、语法填空
根据短文内容,用括号内所给词的正确时态或形式填空。使短文完整。
Spring in Beijing is a warm and ____30____ (sun) season. However, it is also the season for catkins (柳絮). You can see lots of these little white balls of fuzz ____31____ (fly) all around you.
Catkins are the seeds of female polar (杨树) and willow trees. The trees ____32____ (plant) widely in Beijing in the 1960s and 1970s, as they are cheap, easy to take care of and can grow ____33____ (quick). However, catkins pose (造成) a few problems. They can trigger allergies (引起过敏)and make people ____34____ (cough). People with asthma (哮喘) have an ____35____ (special)hard time dealing with them. Catkins can also make it hard for drivers ____36____ (see) the road ahead of them. They can even catch on fire!
The local government ____37____ (try) a few different things to deal with the catkins. “We have trimmed (修剪) some branches. We will also use high-pressure water guns to take down the seeds and wash ____38____ (they) away,” Wang Xiaoping, a Beijing bureau official, said to China Daily. “We ____39____ (improve) the catkin situation significantly in the near future.”
五、用所给单词的正确形式填空
40.Food would most _____ (probable) be in the form of pills and would not be so ___ (taste).
41.India has the second ___________ (large) population in the world.
42.Another new highway will be in ________ in my hometown next month. (serve)
43.Shanghai police celebrated Chinese People’s Police Day on Monday, January 10, 2022 by watching the _________ (raise) of the national police flag at the Shanghai Municipal Bureau of Public Security.
44.If you happen to see a purse ________ (lie) in the street, what will you do
六、汉译英
45.学会如何恰当的处理压力问题对我们来说很重要。(汉译英)
______________________________________
46.他们提供了高水平的服务,我们对此评价很高。
________________________
47.作为一名飞行员,训练几乎占据了她的所有时间。(take up)
____________________________________
48.熬夜打电脑游戏真是浪费时间。
___________________________________________________
49.除非明天下雨,否则我们将看升国旗。
______________________
50.把一切保持得井然有序是一个多么好的习惯啊!
________________________________
参考答案:
1.B
【详解】句意:2022年3月27日下午2时,搜救人员沉默地站着,为MU5735飞机失事132名遇难者默哀。
考查名词辨析。spirit精神;silence沉默;service服务;surprise惊讶。根据“to mourn the 132 victims of the crashed MU5735 aircraft”可知为MU5735飞机失事遇难者默哀,应是默默地站着,in silence“沉默地”。故选B。
2.A
【详解】句意:他们让我和他们一起去购物。我不喜欢购物,所以我改去了电影院。
考查副词用法。instead代替,作副词,一般位于句尾;instead of而不是,介词短语,后常加宾语,宾语多由名词、代词、动名词充当;too也;either也(不)。此处是和“去购物”相反的动作,也就是用“去电影院”代替“去购物”,故选A。
3.A
【详解】句意:你知道,多读好书有助于塑造我们的性格。
考查动词辨析。shape塑造,形成;create创造,创建,产生;appear显现;respect尊敬,尊重。根据空格后“our characteristics”可知是,塑造我们的性格,故选A。
4.C
【详解】句意:所有的桌子都坐满了,所以我们不得不等30分钟。
考查动词短语。give away赠送;keep away远离;take up占据;put up举起,张贴。根据“we had to wait for 30 minutes”可知桌子都被占满了,所以我们才不得不等30分钟。故选C。
5.A
【详解】句意:那个男孩不诚实。他总是为做错事编造理由。
考查动词短语。makes up编造;sets up建立;takes up占用;picks up捡起。根据“The boy is dishonest”可知这个男孩不诚实,总是编造理由。故选A。
6.A
【详解】句意:桂林是一个如此美丽的城市,在漓江两岸有许多美丽的花。
考查so与such的区别和代词辨析。so是副词,后面可以接形容词或副词,后接名词时可用“so+形容词+a/an+可数名词单数”结构;such是形容词,修饰名词,结构有“such+a/an+形容词+可数名词单数”。both表示“(两者)都”,either表示“两者中的任何一个”,all表示“(三个及三个以上)都”,此处指漓江两岸,用both。故选A。
7.D
【详解】句意:——你想去莫愁湖公园还是中山植物园?——都不想去。我想在家学习。
考查代词辨析。all三者及三者以上的全部;both两者都;either(两者之中)任意一个;neither两者都不。根据“I would like to study at home.”可知,“我”想待在家里,由此可知“我”两个地方都不想去,neither符合题意。故选D。
8.C
【详解】句意:经过三天的辛苦工作,我们大家都发现独立完成这项工作很困难,但很重要。
考查形式宾语。that那个;it它;this这个。分析题干可知,此处是动词+it+形容词+to do sth“做某事是……的”的结构,it作形式宾语,动词不定式作真正的宾语。故选C。
9.A
【详解】句意:我们学校的阅读角让我们比以前更容易体验到阅读的乐趣。
考查形容词比较级。根据“than”可知应该用比较级,排除BC选项;空前的it作形式宾语,结构为:动词+it+形容词+for sb to sth,所以此处应用形容词比较级,故选A。
10.C
【详解】句意:——上周,五岳广场中央悬挂着一面国旗。——是的。我们在那里聚在一起,观看了国旗的升起。
考查时态和动名词辨析。raising升起,提升;rising升起。根据“last week”可知句子用一般过去时,动词用过去式hung“悬挂”,排除AB;根据“watched the...of the national flag”可知表示“国旗的升起”,应用及物动词raise的动名词形式。故选C。
11.A 12.D 13.B 14.C 15.B 16.A 17.C 18.A 19.D 20.B
【导语】本文主要讲述一个深陷沙漠的游客仅凭手中的一颗梨带给自己生存的希望,最终走出沙漠的故事。故事告诉人们,保持希望是取得胜利最好的武器。
11.句意:二十多天过去了,旅程进展顺利。
well好地;badly拙劣地;terribly糟糕地;heavily沉重地。根据下文““Soon I’ll be able to walk out of this desert,” he thought gladly.”可知,旅行者认为自己很快就能走出沙漠了,因此旅程进展顺利。故选A。
12.句意:他匆忙用衣服盖着头,趴在沙子上。
played玩;beat打;filled填满;covered覆盖。根据上文“there came a strong sandstorm”可知,强劲的沙尘暴来了,他应该是用衣服盖着头。故选D。
13.句意:大约十分钟后,沙尘暴停止了。
began开始;stopped停止;hid躲藏;continued继续。根据下文“He shook the clothes and stood up”可知,他甩了甩衣服,站了起来,应该是沙尘暴停止了。故选B。
14.句意:在那时,他发现自己在绝望的处境——装有食物和水的背包被沙尘暴卷走了。
snow雪;desert沙漠;sandstorm沙尘暴;smoke烟雾。根据“there came a strong sandstorm”可知,当时有沙尘暴,因此是沙尘暴卷走了背包。故选C。
15.句意:我们知道,没有食物和水离开沙漠似乎是不可能的。
right正确的;impossible不可能的;safe安全的;important重要的。根据“to leave the desert without food and water”可知,在没有食物和水的情况下离开沙漠是不能发生的事情。故选B。
16.句意:除此之外,饥饿、口渴和害怕死亡总是像鬼一样缠绕着他。
death死亡;pain疼痛;illness疾病;sand沙子。根据“ Besides, hunger, thirst and fear of...were always around him like ghosts”可知,旅行者没有食物和水了,但是深陷沙漠中,因此是害怕死亡。故选A。
17.句意:但每一次他濒临绝望时,他强迫自己去盯着那个他一直拿着的梨。
smelling闻;eating吃;keeping保存、留下;imagining想象。根据“but each time he was close to losing hope, he forced himself to stare at the pear that he had been...”可知,旅行者是一直保留着梨,没有吃它。故选C。
18.句意:一个小小的梨子成为了他生存的希望。
hope希望;rule规则;question问题;plan计划。根据上文“but each time he was close to losing hope, he forced himself to stare at the pear that he had been...”可知,每一次他濒临绝望时,他强迫自己去盯着那个他一直拿着的梨,梨是他生存的希望。故选A。
19.句意:三天后,当他看到不远处的村庄时,他激动地笑了。
unless除非;until直到;before在……之前;when当……时候。根据“he saw a village not far away, he laughed with excitement”可知,此处用when引导时间状语从句,表示当他看到不远处的村庄时。故选D。
20.句意:保持希望是取得胜利最好的武器,所以不要告诉自己“什么都没有了”,因为你只有努力寻找,你才能找到一个可以帮你摆脱困境的“梨”。
anything任何事情;nothing没有事情;something一些事情;everything每一件事情。根据“only if you try to search, you can always find a “pear” to pull you out of trouble”可知,你只有努力寻找,你才能找到一个可以帮你摆脱困境的“梨”,因此推断不要告诉自己什么都没有了。故选B。
21.D 22.C 23.B
【导语】本文介绍了两个受欢迎的红色旅游城市。
21.推理判断题。根据“It’s said to be the birthplace of the Chinese nation shown by the Yellow Emperor Mausoleum. Besides, Hukou Waterfall is only about a 2.5-hour drive from Yan’an.”可知,黄帝陵展示了中华民族的诞生地,所以鲍勃对中华民族的诞生地感兴趣,所以他最好去看看黄帝陵。故选D。
22.细节理解题。根据“Now, people can visit the offices and rooms of several leaders at that time, including Zhou Enlai and Zhu De. There is also an exhibition hall, where people can see the weapons and objects used by China’s Red Army, and some sculptures related to China’srevolution.”可知,在遵义能找到中国革命的雕塑、中国红军使用的物品和领导人居住的房间,壶口瀑布没有提到。故选C。
23.推理判断题。根据“It has become the top choice of many Chinese in recent years. Here we would like to introduce two popular red touristcities.”可知,本文介绍了两个受欢迎的红色旅游城,所以推断本文最有可能出现在旅游杂志上。故选B。
24.C 25.A 26.D
【导语】本文主要讲述了“10分钟城市”这个想法的提出及其一些看法等。
24.细节理解题。根据“But during the pandemic, she had to give them up as no such entertainment areas or facilities(设备)were in her community”可知在疫情期间,因为她所在的社区没有这样的娱乐场所或设施,所以她不能踢足球。故选C。
25.词义猜测题。根据“In 2016, French-Colombian researcher Carlos Moreno put forward the 15-minute city idea”可知他提出了15分钟城市的想法,故划线部分和“come up with”意义相近。故选A。
26.推理判断题。根据“The seeds are there, and they’ll grow little by little”可知种子就在那里,它们会一点一点地生长,由此可推知,作者对这个想法是积极的。故选D。
27.B 28.A 29.A
【导语】本文介绍了很多人都喜欢旅行,但是可能没有太多人写旅行日记。其实旅行日记可以帮助我们把这些旅行的经历记录下来,很长时间保存在我们的记忆里,短文中关于如何写旅行日记作者给了我们一些建议。
27.细节理解题。根据“Keep ticket stubs (存根). Whenever you use a ticket for a train or a museum or a ride. Tape the stubs to your journal. They are pieces of history from your journey. Years later you can look at the ticket stubs and see exactly what you were doing on a specific day and how much it cost.”可知,从保留的票根中看不出当时的感受。故选B。
28.主旨大意题。根据“A travel journal (日志) is one of the best ways to keep a long journey in memory. Many details that don’t seem important while you are writing your travel journal often turn out to be so memorable.”可知,作者写这篇文章的主要目的是建议我们如何写旅行日记。故选A。
29.细节理解题。根据“Take a few minutes every day and put down your memories. It doesn’t have to be long, just on a regular basis (定期).”可知,这里是说养成每天写旅行日记的习惯,此为2;根据“They include the day, where you are, who you are with, maybe even the weather and what you eat. Years later when you read your journal, you will know exactly what you were doing on that day.”可知,这里介绍了日记的内容,此为3;根据“Memories of these feelings disappear quickly with time. Writing about the experiences while the memories are fresh is important.”可知,这里是说不要忘记写下你的感受,此为1。因此正确的顺序是2→3→1。故选A。
30.sunny 31.flying 32.were planted 33.quickly 34.cough 35.especially 36.to see 37.has tried 38.them 39.will improve
【导语】本文是一篇记叙文。文章讲述了北京在上世纪六、七十年代广泛种植的杨树和柳树随着它们的长大,春天时柳絮漫天飞舞,给人们带来了许多问题,但本地政府正在想办法解决这一问题。
30.句意:北京的春天是一个温暖而阳光明媚的季节。此处应填形容词作定语,故填sunny。
31.句意:你能看见许多这些白色的小绒毛球在你的周围到处飞。see“看见”感官动词,其宾语后续动词的现在分词,表“看见……正在……”,故填flying。
32.句意:这些树在20世纪60年代和70年代在北京被广泛种植。主语the trees和谓语plant之间为逻辑上的动宾关系,应用被动语态,其谓语结构为“be+done”,根据“in the 1960s and 1970s”可知时态为一般过去时,而主语为复数,所以be动词应用were,故填were planted。
33.句意:因为它们是便宜的,容易照顾并且能快速成长。此处应填副词修饰动词,故填quickly。
34.句意:它们能引起过敏并且使人们咳嗦。make“使”,其宾语后续动词原形作宾语补足语。故填cough。
35.句意:有哮喘的人对付它们是特别艰难的。此处应填副词修饰形容词,故填especially。
36.句意:柳絮也能使司机们看他们前面的路成为困难的。make it+adj.++for sb. to do“使某人做某事成为怎样的”,故填to see。
37.句意:本地政府尝试了一些不同的东西去处理柳絮。此处强调过去做的事对现在的影响,时态应为现在完成时,其谓语结构为“have/has+done”,主语The local government为第三人称单数,所以助动词应用has,故填has tried。
38.句意:我们也将用高压水枪弄掉种子并且冲走它们。此处应用宾格,故填them。
39.句意:在不久的将来我们将显著地改善柳絮的状况。根据“in the near future”可知时态应为一般将来时,其谓语结构为“will+动词原形”,故填will improve。
40. probably tasty
【详解】句意:食物很可能将以药片的形式存在,味道也不太好。根据句子结构可知,空一是修饰动词,应用副词;probable“可能的”,形容词,对应的副词是probably“可能”;空二在系动词be之后,应是形容词做表语,taste“味道”,名词,对应的形容词是tasty“好吃的”。故填probably;tasty。
41.largest
【详解】句意:印度有世界第二大人口。“the+序数词+形容词最高级”为固定用法,表示“第几个最……的”;large“大的”,最高级形式为largest。故填largest。
42.service
【详解】句意:下个月,我家乡的另一条新公路将投入使用。介词in后接名词作宾语。动词serve的名词为service,in service“在使用中”,为介词短语。故填service。
43.raising
【详解】句意:2022年1月10日,星期一,上海警方在上海市公安局观看了国旗的升起,庆祝中国人民警察节。raise“升起”,是动词, 此处位于the和of之间,应用名词,可以用raise的动名词raising充当名词的作用。故填raising。
44.lying
【详解】句意:如果你碰巧看到一个钱包躺在街上,你会怎么做?lie“躺”,是动词。根据“happen to”可知是碰巧看到钱包正躺在街上,see sb/sth doing sth“看到某人/某物正在做某事”,为固定短语,故填lying。
45.It is very important for us to learn how to deal with the problem of stress.
【详解】学会如何恰当的处理压力问题:learn how to deal with the problem of stress;对我们来说很重要:be very important for us。结合语境可知,此题为一般现在时,此题句型是It’s adj. for sb. to do sth.。故填It is very important for us to learn how to deal with the problem of stress.
46.They provided/offered such a high level of service that we thought/spoke highly of it.
【详解】根据中文意思可知,此处可用结果状语从句so/such...that....;提供高水平服务:provide/offer a high level of service;评价很高:think/speak highly of;用代词it代替service。结合句子含义,时态是一般过去时态,故填They provided/offered such a high level of service that we thought/spoke highly of it.
47.As a pilot, training almost takes up/took up all her time.
【详解】as a pilot作为一名飞行员,training训练,almost几乎, take up all her time占据了她的所有时间。根据句意可知,时态是一般现在时或一般过去时,主语是training,动词用三单或过去式。故填As a pilot, training almost takes up/took up all her time.
48.It’s (really) a waste of time to stay up (late) to play computer games./Staying up (late) to play computer games is (really) a waste of time.
【详解】句子用一般现在时;熬夜打游戏:stay up late to play computer games;浪费时间:a waste of time;句子可用it作形式主语,即it is n. to do sth.;也可用动名词作主语,此处be动词用is。故填It’s (really) a waste of time to stay up (late) to play computer games./Staying up (late) to play computer games is (really) a waste of time.
49.Unless it rains tomorrow, we will watch the raising of the national flag.
【详解】unless“除非”,引导条件状语从句,遵循“主将从现”;rain“下雨”,从句主语it是第三人称单数形式,动词用三单;tomorrow“明天”,时间状语;watch“观看”;the raising of the national flag“升国旗”,故填Unless it rains tomorrow, we will watch the raising of the national flag.
50.What a good habit (it is) to keep everything in good order!
【详解】由句意知此句为感叹句,且句中“一个多么好的习惯”构成名词短语,用what引导感叹句,其构成为“What(+a/an)+形容词+名词(+主语+谓语)!”;一个好习惯a good habit;一切everything;把……保持得井然有序keep...in good order,在句中作主语,因为主语太长,可用it作形式主语,此句为一般现在时,故谓语动词be用第三人称单数is,用动词不定式to keep everything in good order作真正的主语,it is可省略。故填What a good habit (it is) to keep everything in good order!