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./

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./

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

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

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

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

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

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

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

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. /