50. (2005江苏卷).They _______ on the program for almost one week before I joined them, and now we ________ it as no good results have come out so far.

A. had been working; are still working　　 B. had worked; were still working

C. have been working; have worked　　 D. have worked; are still working

49. (2005湖南卷)– If the traffic hadn't been so heavy, I could have been hack by 6 o'clock.

　 -- What a pity! Tina _____ here to see you.

A. is　　　　　 B. was　　　 　　　 C. would be　　 　　 D. has been

48.(2005湖北卷)He was hoping to go abroad but his parents ______ that they won’t support him unless he can borrow money from the bank.

A．were deciding　 B．have decided　　 　 C．decided 　 D．will decide

47. (2005湖北卷)．When the old man ______ to walk back to his house ,the sun _____ itself behind the mountain.

　　　 A．started ;had already hidden　　　 B．had started ;had already hidden

C．had started ;was hiding　　 　　 D．was starting; hid

46. (2005广东卷) The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car.

　 A. has been　　　　　　 B. was being　　　　 C. had been　　 　　　D. would be

45. (2005广东卷) Years ago we didn't know this, but recent science ______ that people who don't sleep well soon get ill.

　　 A. showed　　　 B. has shown　　　　 C. will show　　　　 D. is showing

44. (2005北京卷) – Why did you leave that position?

　 　　　　- I __________ a better position at IBM.

　　 A. offer　 B. offered　　　　　　　　　　 C. am offered　　　　 D. was offered

43. (2005北京卷). As soon as he comes back, I’ll tell him when __________ and see him.

　 A. you will come　　　 B. will you come　　　　　 C. you come　　　　　 D. do you come

42. (2005北京卷). Scientists think that the continents __________ always where they _________ today.

　 A. aren’t; are　　 B. aren’t; were　　　　　　　　　　 C. weren’t; are　　　　　　　 D. weren’t; were

41. (2005北京卷). He _________ more that 5,000 English words when he entered the university at the age of 15?

　 A. has learned　　　　　 B. would have learned　　 C. learned　　　　　　　 D. had learned