31. __________ three years since i left school. Now I miss my classmate very much.

A. It was　 　　　　　　 B. It have been　 　　　　　 C. It is　 　　　　　　　　　　　 D. It had been

30. She has worked in this factory __________.

A. after 1968　 　　　 B. in 1968 　　　　　　　　　 C. since 1968　 　　　　　　 D. for 1968

29. Is that the first time you __________ Beijing?

A. have visited　 　 B. would visited　 　　　　 C. visited　 　　　　　　　　　 D. have been visiting

28. Will you please lend me the book when you __________ it?

A. will finish　 　　　 B. have finished　 　　　　 C. will have finished　 　 D. finishing

27. They can't leave until they __________ their work.

A. did　 　　　　　　　　 B. are doing　 　　　　　　　　　　 C. have done　 　　　　　　 D. had done

26. I __________ him a lot during the past two weeks.

A. saw　 　　　　　　　 B. have seen　 　　　　　　　 C. had seen　 　　　　　　　 D. am seeing

25. "Where's your uncle's home?" __________ in Boston in the past years.

A. He's lived　 　　　 B. He's living　 　　 　　　 C. He lives　 　　　　　　　　 D. He lived

24. "The possibility of the flood was just reported over the radio."

"I know. I heard abut it. The river __________ the top of its bank."

A. got　 　　　　　　　　 B. get　 　　　　　　　　　　　 C. gets　 　　　　　　　　　　　 D. has got

23. James Watt __________ the steam engine 　

A. was inventing　　 B. invented　 　　　　　　　 C. had invented　 　　　　 D. has invented

22. While Connie __________ a baseball match, her sister is typewriting a letter in her office.

A. Has watched 　　 B. watches　 　　　　　　　　 C. is watching　 　　　　　 D. has been watching