35. You can’t imagine what great trouble they have ______the problem_______.

　 A. to solve, being discussed　　　　 B. solving , to discuss

　 B. solving, being talked about　 　　D. to solve, to talk about

34. Unluckily, when I dropped in , Dr Smith______, so we only had time for a few words.

A. had just left　 B. has just left　 C. was just leaving　 D. just left

33．When we saw from the plane,______ new-looking earth appeared before us, _______earth that we had never seen before.

　　 A. the , the　　 B. a , an　　 C. an , the　 D. the , an　

32．We tried to find a table for seven ,but they were all_______.

A. given away　　 B. kept away　　 C. taken up　　　 D. used up

31．The time is drawing near _____food raised in space will directly benefit humans below.

A. where　　 B. when　　　 C. whether　　　 D. why

30. 　　　he met with the difficulty did he realize the importance of our help．

A．Even though　　　 B．Never until　　　 C．Only before　　　　 D．Ever since

29．______at my classmates’ faces, I read the same excitement in their eyes.

A. Looking　　　 B. Look　　　 C. To look　 D. Looked

28. -Do you know our town at all?

　　 -Yes, this is the third time I_______ here.

　 A. was　　 B. am coming　　 C. came　　　 D. have come

27. In recent years travel companies have succeeded in selling us the idea that____, the better our holiday will be.

　 A. we go the further　　　　　　　　 B. the farther do we go

　 C. the further we go　　　　　　　　 D. the further we will go

26. When I was doing shopping in the market the other day , I ______an old friend of mine , who I hadn’t met for twenty years.

　A. came up　　 B. came over　　 C. came across　 D. came down