高手帮我讲解几道英语时态上的错题，为什么选此答案？两个空的都要说明。
1.when i was at college i ( ) three foreign language,but i ( ) all except a few words of each.
A:spoke;had forgotten B:spoke;have forgotten
C:had spoken; had forgotten D: had spoken; have forgotten
2.the students ( ) busily when Miss Brown went to get a book she ( ) in the office.
A:had written; left B: were writing; has left
C: had written; had left D: were writing; had left
3.i need one more coin before my collection ( ).
A: has completed B:completes C: has been completed
D: is completed
4.when and where to build the new factory ( ).
A:is not decided B: are not decided C:has not decided
D:have not decided
5.i ( ) 10 minutes to decide whether i should reject the offer.
A:gave B: was given C:was giving D: had given
6. Great changes ( ) in the city,and a lot of factories( ).
A: have been taken place, have been set up
B: have taken place,have been set up
C: have taken place, have set up
D: were taken place, were set up Great
7. she set out soon after dark ( ) home before middle night.
A: arriving B: to arrive C: having arrived D: and arrived
8. do you remember( ) he came?
A: how B when C that D if
參考答案:1。B 第一个空是以前具有的技能 第2个空一直持续到现在对现在产生了影响。
2。D 第一个空明显过去进行时 第2个空是过去的过去那人忘的书
3。D 被动语态 且没必要使用完成时
4.我选A 因为这是一件事
5.B 被动语态
6.B 记住 Happen and take place没有被动语态
7.D 仔细阅读 了解各词性质
8.我傻
