II. 单项选择。
请根据句意和语法，从A、B、C、D中选出最佳答案，并把机读卡上对应题目的答案标号涂黑。（每小题1分，共20分）
21. What __________ honest boy ! And he is __________ best student of all .
A. a ; a B. an ; / C. a ; the D. an ; the
22. --- How well she sings !
--- Yes , she has a very sweet __________ .
A. sound B. voice C. noise D. mouth
23. --- __________ have you studied in Nankai Secondary School ?
--- For two years .
A. How many times B. How long C. How much D. How often
24. Teenagers should learn to protect __________ from all kinds of danger .
A. them B. they C. themselves D. their
25. --- Excuse me , could you help me carry the heavy box ?
--- __________ .
A. Yes , sure B. It doesn’t matter C. Y es , I could D. Don’t mention it
26. The government encourages farmers __________ for jobs in their hometown .
A. to look B. look C. looking D. looked
27. Hurry up ! The piano concert __________ for five minutes .
A. will be on B. has been on C. has begun D. began
28. __________ I am in trouble , my classmates will help me out .
A. Before B. Until C. Unless D. Whenever
29. __________ doctors fought against MERS（中东呼吸综合症）in South Korea in 2015 .
A. Thousands B. A thousand of C. Thousands of D. Two thousands
30. I have bought a new Apple Watch . Can you teach me __________ ?
A. how to use B. what to use C. what to use it D. how to use it
31. Don’t keep silent __________ the face of the school violence（校园暴力）.
A. on B. with C. in D. at
32. --- Oh , my God . I think I am dying .
--- Don’t be nervous . There is __________ . You just have a cold .
A. serious something B. something serious
C. serious nothing D. nothing serious
33. --- I don’t know where to go this summer vacation .
--- Why not __________ visiting Chongqing ? There are many places of interest there .
A. discuss B. wonder C. consider D. regard
34. --- Lily , why are you still here ? School is over for half an hour .
--- Because I __________ my work yet . I still need one more hour .
A. won’t finish B. didn’t finish C. am not finishing D. haven’t finished
35. --- We’re doing a lot to protect our environment , but it is not good enough .
--- So we should try __________ to look after it .
A. hard B. harder C. hardly D. more hardly
36. Please help me __________ my old toys . My room is too small to store them .
A. come out B. work out C. find out D. clear out
37. He didn’t give me anything . __________ , he asked me for something .
A. Instead B. Instead of C. So D. Because
38. --- Where is your brother , Tom ?
--- He __________ Beijing and he __________ Beijing for a week .
A . has been to ; has gone to B. has been to ; has been in
C. has gone to ; has been to D. has gone to ; has been in
39. --- Are you free on Saturday or Sunday ?
--- __________ . I’m quite busy on weekends because of different after-school activities .
A. Both B. Neither C. Either D. All
40. Would you please tell me __________ , Mr. Wang ?
A. what should we do B. we should do what
C. what we should do D. should we do what