22. Last week, I got a copy of New English 900 at a bookstore; after I read it, I went on _____ theNew Concept English.

A. reading
B. in reading
C. to read
D. read

23. It is perhaps not generally realized _____ to make really accurate translations of high technical material.

A. how difficult it is
B. how difficult is it
C. how it is difficult
D. how is it difficult

24. _____ on a clear day, far from the city crowds, the mountains give him a sense of infinite peace.

A. If walking
B. While walking
C. Walking
D. When one is walking

25. So little _____ about mathematics that the lecture was completely beyond me.

A. I know
B. I knew
C. do I know
D. did I know

26. It was not long _____ the news spread and people from all over the world came to visit this miracle of nature.

A. after
B. before
C. until
D. when

27. No sooner had we reached the top of the hill _____ we all sat down to rest.

A. when
B. then
C. than
D. until

28. San Francisco is usually cool in the summer, but Los Angeles _____ .

A. is rarely
B. rarely is
C. hardly is
D. is scarcely

29. Our teacher recommends that we _____ as attentive as possible when we visit the museum.

A. are
B. shall be
C. were
D. be

30. Nuclear science should be developed to benefit the people _____ harm them.

A. more than
B. other than
C. rather than
D. better than

Section BDirections: There are 5 incomplete statements here. You should fill in each blank with the proper form of the word given in the brackets.31. He is unable to answer the questions about the new text. He should (preview) _____ it yesterday.32. If either of you (take) _____ a vacation now, we will not be able to finish the work.33. He is an honest official and never accepted any gifts from people who (seek) _____ his help.34. The opinions (express) _____ in the editorial section of that newspaper are usually conservative.35. It must (be) _____ around nine o'clock when I drove back home because it was already dark.