41） Great changes _____ (take) place in my hometown since 19

41） Great changes _____ (take) place in my hometown since 1996.
42） Ms.Black _____ ( teach) math for 21 years.
43） He _____ (be) to Paris five times.
44） He joined the army when he was 18.He _____ (be) an army man for many years.
45） I don't want to see the film because I _____ (see) it.I saw it last Monday.
46） He told me he _____ (meet) her before.
47） She thanked me for what I _____ (do) for her son.
48） I _____ (learn) 300 English words by the end of last month.
49） He _____ (leave) his office when I arrived there.
50） She _____ (visit) the city three times before she died in 1997.
51） They knew she _____ (borrow) a lot of money for her daughter.
52） She said she _____ (be) sorry she _____ (forget) my name.
53） John _____ (come) to see us last night after we _____ (phone) him twice.
54） The old woman _____ (be) very happy that she _____ (get) to the top of the mountain at last.
55） Miss Smith said she _____ (meet) him once 6 years before.
56） The boy is too late.The school bus _____ (go).
57） The old man thanked the policemen for what they _____ (do).
58） I _____ (meet) Sue last Monday.We _____ (not see) each other for nearly 2 years.
59） That British ship _____ (leave) for New York two months ago.
60） The tall boy _____ (hand) in his test paper before the class _____ (be) over.

41） Great changes ___have taken__ (take) place in my hometown since 1996.
42） Ms. Black _has taught____ ( teach) math for 21 years.
43） He __has been___ (be) to Paris five times.
44） He joined the army when he was 18. He _has been____ (be) an army man for many years.
45） I don't want to see the film because I __have seen___ (see) it. I saw it last Monday.
46） He told me he __had met___ (meet) her before.
47） She thanked me for what I __had done___ (do) for her son.
48） I _had learnt____ (learn) 300 English words by the end of last month.
49） He _had left____ (leave) his office when I arrived there.
50） She _had visited____ (visit) the city three times before she died in 1997.
51） They knew she _had borrowed____ (borrow) a lot of money for her daughter.
52） She said she _was____ (be) sorry she _had forgoten____ (forget) my name.
53） John _came____ (come) to see us last night after we __had phoned___ (phone) him twice.
54） The old woman _was____ (be) very happy that she _had got____ (get) to the top of the mountain at last.
55） Miss Smith said she _had met____ (meet) him once 6 years before.
56） The boy is too late. The school bus _had gone____ (go).
57） The old man thanked the policemen for what they _had done____
(do).
58） I __met___ (meet) Sue last Monday. We __had not seen___ (not see) each other for nearly 2 years.
59） That British ship _left____ (leave) for New York two months ago.
60） The tall boy __had handed___ (hand) in his test paper before the class _was____ (be) over.
楼主你的题目很好啊,刚好都是有关完成时的,而且非常典型.
下面我说点技巧好了
现在完成时：用在：过去的事件和现在还有关联,一般题目里就是有一部分是现在,剩下要你填的就是过去的事了,那就要用现在完成时.
题目41-45为一类的,都是到现在为止的意思,41,自从1996以来的变化；42,43也是,虽然他们没有很明确的说now,但是其实是不言自明的到现在教了多少年书,去了几次巴黎.看到时间是一段时间的,for多少年,多少次,很明显是用完成时,没有其他累赘的,那就是现在完成时.
45非常明显：我现在不想看电影,因为我已经看过了.（我过去看过这个电影了,并对现在产生影响,所以是现在完成）
过去完成时：比现在完成时复杂一些.用在：
1,从句里首先确定是完成时,再加上主句是过去时的话,那么就要遵循主从句一致.从句变成过去完成.（46,47,51,57就是这样）
2.48是一个变化句型,要特别掌握的.by the end of+时间
by the end of+过去时间：过去完成时
by the end of+将来时间：将来完成时
3.很明显的句子里面出现了两种动作,并且有先后.那么先前的那个动作的时态就是过去完成.（49,50,52,53,54,55,56,58,60）
最后有个57题,我觉得没什么前后文,就一般过去时就可以了,可能是放在里面让你们和其他两种时态分辨开来的吧.
这一组题挺典型的,挺好.
上面这些我是根据你的题目归类的,以后还有什么补充的我还可以补充给你的.