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“問(wèn)題的答案”，為固定搭配。

17. A  因?yàn)楹闷嬗袝r(shí)我們才有問(wèn)題，后一句是前一句的原因。

18. C  前后分句之間為轉(zhuǎn)折關(guān)系，用but連接。

19. A  花草應(yīng)是“生長(zhǎng)”在人行道上,grow意為“生長(zhǎng)”。

20. D  此處意為“當(dāng)你看見(jiàn)小鳥(niǎo)在天空飛翔時(shí)”。see sb./sth. doing為固定搭配，意為“看見(jiàn)某人/某物在做……”。

21. D  因?yàn)楹闷�，就要去證明這些問(wèn)題。prove“證明”。

22. A   make sb. do sth.“使/讓某人做某事”，使役動(dòng)詞make后用省略to的不定式作賓補(bǔ)。

23. B  這里是there be句型，后面的名詞為復(fù)數(shù)，所以這里用 are。

24. A  因?yàn)閠hem指代problems,又表肯定意義，故用a few。

25. C  藥物可阻止疾病。故選C。