冀教版九年级上册Unit 5 Look into Science Lesson28配套练习（含答案）

Unit 5 Look into Science
Lesson 28　The Study of Living Things
Ⅰ. 根据句意及汉语提示填空。
1. The boy often has many _________（奇异的）dreams about his future.
2. How surprising! Willows（柳树）can send messages through a _________ （化学物质）they produce.
3. I can use leaves to make all kinds of things on the paper, such as _________ （蝴蝶）and dancing girls.
4. David was _________ （完全地）lost in the forest. He had no choice but to wait for someone to find him.
5. In China, it’s common to see that grandparents help to look after their _____________ （孙子; 孙女）.
Ⅱ. 单项选择。
6.The little baby shouted to draw people’s ____.
A. attention B. pollution C. rubbish D. information
7.There is a rule to____ the screen time. Now students spend less time online.
A. cut off B. cut down C. cut out D. cut up
8. —What are you looking for
— I’m looking for the dictionary____ my brother gave me last month.
A. that B. what C. who D. whom
9. I like reading books very much. I think we should____ as much time as we can reading in our spare time.
A. cost B. take C. spend D. pay
10. The butterfly _____eggs on the milkweed.
A. lies B. lays C. lain D. lying
Ⅲ. 连词成句。
11. be, like, would, a, you, to, biologist
____________________________________
12. know about, mysteries, do, what, you
____________________________________
13. winter, return to, in, the south, birds
____________________________________.
14. puzzling, how, to, see, here, it, is, them
____________________________________!
15. days, the, him, is, these, problem, worrying
____________________________________.
Ⅳ. 完形填空。
Each year, the monarch butterfly from eastern Canada travels about 3,000 miles to its winter home in central Mexico.16____ can it fly so far And why does it make this long and dangerous trip Scientists still don’t have an answer.
For many years, people in Mexico wondered where the orange-and-black butterflies came from every winter. In 1937, a scientist started to 17 ____ and study the butterflies.For the next 20 years, he discovered that one butterfly started its trip in Canada. Four months later, it 18 ____ in Mexico.
The length（长度）of the butterflies’ trip is only one part of the mystery. 19 ____ amazing thing is that the butterflies always 20 ____ the same area in central Mexico.How do the butterflies find their way back to the same place This is an interesting question 21 ____ only every fourth generation（代） makes the trip south.
In other words, the butterfly that travels to Mexico this year is the great-great-grandchild of the butterfly 22 ____ traveled there last year.
Each year, four generations of a monarch butterfly family are born. Each generation of the family has a very 23 ____ life.The first generation is born in the south in late April. It 24 ____ moves north, reproduces（繁衍）, and then dies. On the trip north, two more generations are born, reproduce, and die.
Each of these generations of butterflies lives for only two to five weeks. In autumn, the 25 ____ generation of butterflies is born. This generation has a much longer life. It lives for about eight months. This generation of butterflies makes the amazing journey back to the winter
home of its great-great-grandparents.
Today, people are still studying monarch butterflies. But they are not clear about everything. There are still many mysteries to be solved.
16. A. How B. What C. When D. Where
17. A. drive B. follow C. examine D. conclude
18. A. got B. reached C. left D. arrived
19. A. Other B. The other C. Another D. Others
20. A. come from B. go away C. find out D. return to
21. A. so B. although C. but D. because
22. A. that B. what C. whose D. whom
23. A. different B. difficult C. long D. simple
24. A. clearly B. luckily C. slowly D. politely
25. A. second B. third C. fifth D. fourth
参考答案：
一、fantastic；chemical；butterflies；completely；grandchildren
二、ABACB
三、Would you like to be a biologist；What mysteries do you know about；Birds return to the south in winter；How puzzling it is to see them here；The problem is worrying him these days
四、ABDCD DAACD