41.—Could I use your dictionary? ( )— Yes, you _________.

A. need B. could C. can D. should

解析：选 C。 此题容易误选 B. 此题中 could 并不是表示过去，而是委婉的征求意见，其肯定回答是 Yes, you can。

42. In the past few years there _________ great changes in my hometown. ( )

A. have been B. were C. had been D. are

解析：选 A. 此题容易误选 A. 一般情况下 In the past few years 用于现在完成时，In the past 用于一般过去时。

43. —Could you tell me when Mr. Li ________ in Huanggang ( )— Sure. When he ________, I’ll call you.

A. arrives; will arrive B. will arrive; arrives C. arrives; arrives D.will arrive; will arrive

解析：选 B. 第一句是宾语从句根据语境用一般将来时，第二句是时间状语从句，由于主句是一般将来时，那么从句要用一般现在时来代替

44. —Mary dances best in our school. ( )—I agree. I’ll never forget ___ her dance for the first time.

A.see B.to see C.seeing D.seen

解析：选 C。此题容易误选 B. 如果学生想正确选出答案，必须知道 forget to do sth(忘记做某事);forget doing sth(忘记做过某事)。根据语境选择 C。

45. —Is tea ready? ( )—No, mother is _______ it ready now.

A. doing B. cooking C. burning D. getting

解析：选择 D. 此题稍难，ready 是形容词，get sth +adj 是准备好某事。A, B, C, 动词后面只能接副词。

46. There are many people downstairs. What do you think _________ ? ( )

A.to happen B. happening C. is happened D. has happened 学而思理科服务 微信公众号(iD:xeslike)

解析：选择 D. 此题我们首先排除 C. 因为动词 happen 是不及物动词，没有被动语态。B答案少了助动词 is, A 动词不定式表示将来，根据语境应该用现在完成时或现在进行时。

47. Remember to spend some time____ your loved ones,because they are not going to be aroundforever. ( )

A. from B. with C. in D. on

解析：选 B. 此题 95%的学生容易选错。主要是受 spend…on...思维定势的影响。其实句意是记住与你喜欢的人度过一段时间，因为他们不会永远与你在一起。

48. —I hear Sam has gone to Qingdao for his holiday.—Oh, how nice! Do you know when he _______? ( )

A. left B. was leaving C. has left D. had left

解析：选 A. 前面说萨姆已经去青岛度假了，说明已经离开。而 when 一般情况下不能与现在完成时连用，故选 A。

49.—David, look at the man in white over there. Can you tell me _______ ? ( )—He is a doctor.

A.who is he B.who he is C. what does he do D. what he does

解析：选择 D. 此题可以用排除法，宾语从句用陈述句语序，容易排除 A, C. 根据答语 He is a doctor 知道应该是问职业，who 是用来询问身份的。

50. —I want to teach inTibet when I graduate from the college. ( )—Me too.Teachers ___very much there.

A. need B. are needing C. are needed D. is needed

解析：选 C。老师在那儿是被需要，排除 A, B. 主语 Teachers 是复数，排除 D. 故选择 C。