Question

   Why do we want to do experiments? We want to do experiments to find the answers 16 our questions or problems.

Sometimes we have questions 17  we’re just curious (好奇的) . When your dog is barking a lot 18 no one comes into your home,when flowers and grasses 19 in the sidewalk,or when you see birds 20  in the sky,your curiosity may get the better of you and you start 21 all kinds of questions. This may make you 22 to find those answers by doing experiments.

People also ask questions because there 23  serious problems. Disease,pollution,and earth warming are just 24 of them. Scientists try to find 25   to stop the diseases or the sources (根源) of other problems. The scientific methods help do this.

16. A. of   B. to   C. about   D. on

17. A. because   B. because of   C.so   D. since

18. A. and   B. or   C. but   D. so

19. A. grow   B. discover   C. find   D. fill

20. A. to fly   B. flied   C. fly   D. flying

21. A. explaining   B. speaking   C. talking   D. proving

22. A. try   B. trying   C. to try   D. tried

23. A. is   B. are   C. has   D. have

24. A. a few   B. few   C. a little   D. little

25. A. articles   B. conclusions   C. medicines   D. news

Answer 1

16. B  the answer to the question“问题的答案”，为固定搭配。

17. A  因为好奇有时我们才有问题，后一句是前一句的原因。

18. C  前后分句之间为转折关系，用but连接。

19. A  花草应是“生长”在人行道上,grow意为“生长”。

20. D  此处意为“当你看见小鸟在天空飞翔时”。see sb./sth. doing为固定搭配，意为“看见某人/某物在做……”。

21. D  因为好奇，就要去证明这些问题。prove“证明”。

22. A   make sb. do sth.“使/让某人做某事”，使役动词make后用省略to的不定式作宾补。

23. B  这里是there be句型，后面的名词为复数，所以这里用 are。

24. A  因为them指代problems,又表肯定意义，故用a few。

25. C  药物可阻止疾病。故选C。