20.　 We had to delay the party till next week, _____ we would have something important to do.

A. when　　　　　 B. which　　　　　 C. while　　　　　 D. before

19.　 I hope you will find this valley a beautiful place ______ you may spend your weekend.

A. which　　　 B. that　　　 D. when　　　 D. where

18.　 Have you ever been to Shanghai, ______ I left then years ago?

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

17.　 We saw the hill, and ________ there used to be a factory.

A. in front of which　 B. on the top of which　 C. at the foot of it　 D. from it

16.　 Do you know the professor in ______ hometown we stayed?

A. which　　　 B. his　　　 C. whose　　　 D. whom

15.　 It’s the playground ______ I picked up this jacket.

A. from which　　 B. that　　 C. from where　　 D. where

14. The Great Wall is the last place ______ Mr. Smith is going to visit before he leaves Beijing.

　 A. where　　　　　 B. which　　　　　 C. /　　　　　 D. what

13.　 He lent me $1,500 ______ I bought a diamond necklace for her.

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

12.　 Mount Blanc, ______we visited last summer, is the highest mountain in Europe.

A. where　　　　 B. that　　　　 C. which　　　　 D. what

11.　 There was a teapot shaped like a Chinese duck, out of ______ mouth the tea was supposed to come.

A. which　　　　 B. that　　　　 C. its　　　　 D. whose