5.　　　 1) I will never forget the days ______ we studied together.

2) I will never forget the days ______ we spent together.

A. that　 B. on when　　 C. when　　 D. on which

4.　　　 1) _____ we all know, China, is rich in natural resources.

2) _____ is well- know that China is rich in natural resources.

3) _____ is well- know, China is rich in natural resources.

A. Which　 B. As　　 C. It　　 D. That

3.　　　 1) He still lives in the room ______ window faces to the east.

2) He still lives in the room , the window ______ faces to the east.

3) He still lives in the room ______ is in the north of the city.

4) He still lives in the room ______ there is a beautiful table.

　　　 A. which　 B. whose　　 C. where　 D. of which

2.　　　 1) He has two sons, _____ are college students.

2) He has two sons, and　 _____ are college students.

A. both of which　 B. both of whom　 C. both of them

1.　　　 1) This is one of the most interesting films ____ shown last week.

2) This is the only (very) one of the most interesting films ____ shown last week.

A. which was　 B. that was　 C. which were　 D. that were

15. Tom told the teacher the reason ______ he was late again.

A. that　　　 B. for why　　　 C. for that　　　 D. for which

14. Wang Fei is the boy _____ I think is the most diligent in our class.

A. who　　　 B. whom　　　 C. about whom　　 D. him

12．I still remember the summer _____ we had the drought.

A. which　　　 B. why　　 C. where　 D. when

13 China is not the same country ______ it was 20 years ago.

A. that　　　 B. as　　　 C. which　　 　D. when

11．The way _____ you are doing it is complete crazy.

A. in which　　　 B. by which　　 C. on which　　 D. at which

10．This is the same girl _____ came to borrow an English book two days ago.

A. that　　　 B. who　　 C. which　　 D. whom