请帮我分析并解答几道英语选择题

1、 The two things __________ they felt very proud are Jim’s gold watch and Della’s hair.
A. about which B. of which C. in which D. for which
2、Ours is a beautiful school, ________ we are proud.
A. about which B. of which C. in which D. for which
3、The astronaut did many experiments in the spaceship, __________ much help for knowing space.
A. which we think it is B. which we think are of
C. of which we think is D. I think which is of
4、The desk ________ which Jack is leaning is John’s.
A. in which B. on which C. against which
5、The dinner was the most expensive meal we __________.
A. would have B. have had C. had never had D. had ever had
6、 They were interested __________ you told them.
A. in which B. in that C. all that D. in everything
为何不能选C？
7、The great day we looked forward to __________ at last.
A. come B. came C. coming D. comes
8、 This is the only article of these th

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