50. Do you know _________

　　 A. when will he give back the tape

　　 B. whether has he received higher education

C. why is he so busy these days

　　 D. whether she will join in our English Evening

49. -Hi, Mary. We are going to visit the exhibition of " Long March" this Saturday afternoon.

　 -___________

　　 A. So I am　　　　 B. So do I　　　 C. So I do　　　 D. So am I

48. He didn′t know________ , so he stopped _______the way.

A. to go to where; to ask　　 　　 B. how to go to; to ask

C. where to go; asking　　 　　　　 D. how to get there; to ask

47. I'm sorry you can′t see the headmaster now.　 He _______the office for two hours.

A. has left　　　　　　　　 　　　 B. has come to

C. wasn’t in　　　　　　　 　　　 D. has been away from

46. -What are you doing, Mum?

　 -I _________ , Uncle Wang_______ to have dinner with us tonight.　　

A. am cooking; is going out

B. cook ; goes out

C. am cooking; is coming

D. cooking; coming

45. _________you work, ________-knowledge you’ll get.

　 A. The harder; less　　　　　 　　　 　　　 B. The harder; the more

C. Harder; the more　　　　　 　　　　　 D. Harder; more