18. A. seconds B. minutes C. hours D. days
19. A. but B. and C. so D. because
20. A. hungry B. healthy C. pretty D. lucky
21. A. spend B. take C. pay D. cost
22. A. At first B. At last C. After all D. In fact
23. A. paying B. preparing C. looking D. caring
24. A. myself B. themselves C. yourself D. himself
25. A. Before B. After C. Until D. When
26. A. wake up B. dress up C. grow up D. take up
27. A. from B. in C. on D. with
28. A. in the morning B. in the afternoon C. in the evening D. at night
29. A. cover B. pollute C. fill D. shake
30. A. car B. tank C. use D. life
三、阅读理解（本题有15小题，每小题2分；共计30分）
阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。
A
Do your kids ask a lot of questions? If they do, that's great. Because that's how children learn. Some of these questions may be easy to answer. Others may be hard. And they want to get the right answers. Do your kids ask such questions?
●Why is the sky blue? Why is the sunset（日落） red?
●Why are leaves green?
●Why do leaves change color in autumn?
●Why is cold in winter?
Can you answer these questions? If not, don't worry. Though Science Made Simple can't help with all of life's important questions, it can help with those. In this fast changing world, the more your children know about science, the better.
31. Which of the following can you find in Science Made Simple?
A. How can we paint better? B. How do airplanes fly?
C. Which are the newest films? D. Why are there seven days in a week?
32. If you don' t like the first issue of Science Made Simple, you will pay _________.
A. ＄11.95. B. ＄1.195. C. nothing. D. ＄10
33. This passage is _________.
A. an ad(广告) B. news C. a story D. a letter
B
Potatoes are becoming China's fourth main food after rice, wheat（小麦） and corn.
Potatoes have many good points as a main food. They are rich in vitamin C and potassium(钾). A potato's vitamin C is as rich as 10 apples. Also, potatoes are lower in calories (卡路里) than wheat and corn. What's more, potatoes are easy to grow. It can be grown in both the north and