45. You may do ____ you want on condition that you stay in the room .

　 A．whatever　 　　　 B．which　　 C．no matter what　 D．all what

44. -Would you tell me ____ you want your tea, with sugar or milk?

　　　 - Sugar, please.

　 A. whether　 　　　 B. when　　 C. what　　　 　　　 D. how

43. He is clever, but ____, he makes many mistakes.

　　　 A．on the contrary 　　　　　　　　　　　 B．on the other side　

　　　 C．on the other hand　 　　　　D．on one hand

42. Many possible means have been tried, but _______ worked.

A. no one 　　 　　　　B. nothing 　　　　　

C. none 　　　　 　　D. a few

41. The doctor 　　　　is leaving for Africa next month.

A. the nurse is talking to him　　 B. whom the nurse is talking

C. the nurse is talking to　　　　 　D. who the nurse is talking