6. The freezing point is the temperature _____ water changes into ice.

　A. at which 　　　B. on that 　　　　C. in which 　　　D. of what

5. The wolves hid themselves in the places ________couldn’t be found.

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

4. Is this the factory __________ he worked ten years ago?

　A. that 　　B. where 　　C. which　 　D. the one

3. Is this factory __________ some foreign friends visited last Friday?

　A. that 　　B. where 　　C. which　 　D. the one

2. Is this the factory __________ you visited the other day?

　A. that 　　B. where 　　C. in which 　　D. the one

1.Such things of __________ you are not sure.

A. which 　　　B. what 　　C. as　 D. those

1.① The man ______ she married last year was a soldier. A. whom B. to whom C. with whom D. whose ② The man ______ she was married was a soldier. A. whom B. to whom C. with whom D. who 2.① The day ______ she spent with us was never to be forgotten. A. / B. on which C. when D. in which ②The day ______ she played with us was never to be forgotten. A. that B. when C. which D. / 3. ① Is this the factory ______ you visited last week A. where B. which C. to which D. in which ② Is this factory ______ you visited last week 　　　　A. that B which C in which D. the one 4. ① The house ______ window faces south is for the doctor. A. which B. that C. whose D. of which ② The house ______ faces south is for the doctor. A. which B. whose C. who D. where 5. ① She brought forward a plan ______ we couldn't agree. A. that B. which C. / D. to which ② She brought forward a plan ______ we couldn't accept. A. / B. for which C. to which D .of which 6. ① The invention ______ she spent 2 years will do well to the world. A. which B. / C. on which D. when ② The invention ______ took her 2 years will do well to the world. A. which B. / C. on which D. it 7. ① The English subject, ______ I do well, is important in middle schools. A. which B. that C. in which D. at which ② The English subject, ______ I have mastered well, is important in middle school. A. / B. at which C. that D. in which 8. ① Tom, ______ I went to the concert, is a friend of mine. A. whom B. who C. with which D. whose ② Tom,______ bicycle 1 went to the concert,is a friend of mine. A. whom B. who C. whose D. on whose 9.① The place ______ you visited during your holidays is where I used to be for years. A. where B. which C. in which D. to which ② The place _______ you stayed for 3 years is where an ancient city used to be. A. where B. which C. that D. to which 10.① She will fly to Washington,______ is the capital of the U.S. A. that B. where C. which D. in which ② She will fly to Washington,______ she can enjoy herself. A. where B. that C. which D./ 11.① The story happened on a day ______ the weather was wet and cold. A. when B. which C. in which D. on when ② The story happened on a day ______ was wet and cold. A. then B. on which C. which D./ 12.① The sun heats the earth,______ we all know.　　 A. that B. which C. as D. where ② The sun heats the earth,______ makes it possible to grow crops. A. which B. that C. as D. where 13.① Tom,______ we had expected, got the 1st place in the competition(比赛). A. as B. which C. whom D. who ② Tom,______ we had expected to help us, didn't even show his face . A. as B. whom C. that D. which

6. That stone is so heavy that no one can remove it away.

　 That is such a heavy stone ________________________.

5. The Hope School has been set up where a wasteland used to be.

　 The Hope School has been set up __________________________.

4. There are lots of birds flying south for winter every year.

　 There are lots of birds ____________________________.