2.　　　 Fifty years ago, mixed-race ______________(婚姻) were __________________(禁止)。

1.　　　 __________________(奴隶制) is the system by which some people are owned by others.

25. More patients ___________ in hospital this year than last year.

　 A. treated　 B. have treated　 C, had been treated　 D. have been treated

24. The window is dirty.

　 I know. It __________ for weeks.

　 A. hasn’t cleaned　 B. didn’t clean　 C. wasn’t cleaned　 D. hasn’t been cleaned

23.The new books are of great use . They __________ well and　 ____________ already.

　A. sell, have been sold out　 　　B. sold, had sold out　

　 C. sell, sell out　　　　　　　 D. sold, have sold out

22. Black people in the southern states were not allowed ___________ white people,.

A. to marry 　　B. to marry with　 C. marrying　　 D. marrying with

21. By doing this he ________________ the rest of the world.

　 A make an example of　　 B. set an example to 　　

C. set an example for　　 D. gave an example for

20. People __________ AIDS should be treated with respect.

　 A. of　　 B. have　 C. in　　 D. with

19. He believed that ____________ skin colour,　 people should have equal rights.

　 A. thought　 B. regardless of 　C. as if　　 D. even’

18.---Do you mind if I open the window?

　 ---- ___________ I feel a bit cold

　 A. Of course not.　 B. I’d rather you didn’t 　C. go ahead　 D. Why not?