21. It is just as hard to persuade my wife not to dance ____ to keep me from the football　field.

　　A. so it is B. as it is C. so is it D. as is it

　　22.It was dark and cold. They had to find a house ____ and some wood ____.

　　A. to stay in…to make a fire with B. to stay…to make a fire with

　　C. to stay in…to make a fire D. to stay…to make a fire

　　23 Some of the middle-aged people ____ to the meeting were famous professors.

　　A. were invited B. who invited C. inviting D. invited

　　24 Most green vegetables, ____ for too long, will lose nutrition.

　　A. if to be cooked B. if cooked C. if cooking D. if being cooked

　　25.____ you dislike ancient buildings, Warrick Castle is worth a visit.

　　A. As B. If C. Even if D. Now that

　　26.____ the expense, I ____ a round-the-world tour.

　　A. Were it not … would take B. If it were not… take

　　C. Weren't it for… will take D. If it hadn't been for… would have taken

　　27. ____ from the top of the mountain, the whole city looks beautiful.

　　A. Seen B. Seeing C. See D. Looked

　　28. ____ the essay a second time, the hidden meaning will become clearer to you.

　　A. While reading B. After reading C. Your having read D. When you read

　　29.____ impressed the visitors deeply was ____ the workers made with their hands.

　　A. What…that B. That…that C. What…what D. That…what

　　30. The newspaper's owner and editor ___ away on holiday.

　　A. is B. are C. be D. have been

　　31.Recent estimates show that ___ more than two million bird-watchers in the United States.

　　A. there are among B. are there the C. there are D. among the

　　32.Ellis Haizlip began his stage career in Washington, D.C., ___ supervised the Howard University Players during their summer season.

　　A. he was B. where he was C .which he D. where he

　　33.Some people hold that the more conservative the world becomes, have old furniture, old houses and old paintings.

　　A. the smarter is to B. the smarter it is to

　　C. is it the smarter so D. is one to the smarter

　　34. She was just about to explain ___ she hadn't passed her maths test chiefly out of carelessness ___ her uncle came.

　　A. her mother … when B. to her mother why … that

　　C. her mother that … when D. to her mother that … when

　　35.With the shining water before you and the wind ___ , trees behind you, you can not help ___.

　　A. blown … but feel relaxed B. blowing … feeling relaxed

　　C. blown … but feel relaxing D. blowing … but feel relaxing

　　36. "Will you be able to finish the job this week?" " ___ ."

　　A. I can't say it B. I don't know that C. I'm not sure this D. I don't expect so

　　37.It's impossible for a child to do so much work within a short period of time, ________ ?

　　A. isn't it B. is it C. has it D. hasn't it

　　38. _______ that Mr Thomson got such rare fishes ?

　　A. When and where was it B. When and where it was

　　C. Was it when and where D. When and where were it

　　39. Only after a baby seal is pushed into the sea by its mother ___ to swim.

　　A. how will it learn B. it will learn how C. will it learn how D. and it will learn how

　　40. Peter and Bob both did well, but Peter is ___ of the two.

　　A. more talented B. the most talented C. most talented D. the more talented