22. In the first half of 2002,the number of people with AID or ______with the HIV virus in China was reported to be 1 million.

　 　　 　A. infected　　　　　　　　　 B. infecting　　　　　　　　　 C. were infected　　　　　　 D. to be infected

21. The boy dived into the water and after _______ seemed to be a long time, he came up again.

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