11. —How did you get in touch with the travel agent, Robin?

　　—Oh, that’s easy. I surfed the Internet and then called one ________ the telephone number is provided.

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

　　12. October 15th is my birthday, ________ I will never forget.

　　A. when B. that C. what D. which

　　13. The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.

　　A. when B. where C. which D. whose

　　14. There are several research centers in China ________ a certain disease called Bird Flu is being studied.

　　A. which B. where C. when D. what

　　15. I hope that the little ________ I have been able to do does good to them all.

　　A. which B. what C. that D. when

　　16. The time is not far away ________ modern communications will become

　　widespread in China’s vast countryside.

　　A. as B. when C. until D. before

　　17. ________ is known to everybody, Taiwan is a part of China. We must unify it.

　　A. It B. As C. Which D. What

　　18. I shall never forget the day ________ Shen Zhou V was launched, ________ has a great effect on my life.

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

　　19. The bread my wife makes is much better than ________ you can buy at a store.

　　A. that which B. one that C. that of which D. this of which

　　20. There is no such place ________ you dream of in all this world.

　　A. that B. what C. which D. as