C. shouldn't have D. won't have 满分：2 分
45. Joan had ( )for 75 hours before she got her licence. A. fly B. flown C. to fly D. flying 满分：2 分
46. Jack is good, hard working and intelligent. ( ). I can't speak too highly of him. A. As a result B. By the way C. On the contrary D. In a word 满分：2 分
47. -What do you think of his suggestion? -( ). A. No, I don't believe it B. It's hard to say, actually C. Sorry, I can't remember her D. I never think of him 满分：2 分
48. He visited us yesterday evening( )we were watching TV. A. and B. as soon as C. when D. while
满分：2 分 49. -May I see the menu, please? -( ). A. That is the menu, sir B. Yes, please go on C. Here you are, sir D. Of course, sir 满分：2 分 50. Are you ( )of the mistakes you have made? A. aware B. sure C. clear D. knowing 满分：2 分