34. The old man, _______, ran out of the dark cave.

A. trembling and frightening　　 B. trembling and frightened

C. trembled and frightened　　　 D. trembled and frightening

33. – Do you know why the river was polluted?

-- Many different factors ___________ the serious pollution of the river.

A. contributed to　　　　　 B. adjusted to　　　　 C. were accustomed to　 D. were attached to

32. Some scientists are checking the rocket a fifth time before it is launched. They must be very careful. You know, _______.

A. all is well that ends well　 B. Little leaks sink the ship

C. Seeing is believing. 　　D. You can lead a horse to water, but you can’t make him drink.

31. While income worry is _____ rather common problem of the aged, loneliness is another problem that ____ aged parents may face.

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

30. ______ the city lies the famous beautiful mountain.

A. Southeast 40 miles to　　　　　　　 　　　　 B. To 40 miles southeast of

C. 40 miles southeast of　　　　 　　　　 D. To southeast 40 miles of

29. Fortunately somebody who happened to be passing by called the fire department _____ the fire broke out.

A. hurriedly　　　　 B. quickly　　　　 C. immediately　　　　 D. shortly

28. Class regulations require ____ is the last to leave the classroom ____ off all the lights.

A. who, should turn　 B. whom, shall turn　 C. whomever, turns　 D. whoever, turn

27. John, stop complaining about others. _______. You should learn more from your mistakes.

A. That’s all right. 　　　　　B. I have had enough of you.

C. You’re welcome. 　　　　D. Don’t you mind it.

26. It is the protection for the trees _____ really matters, _____ how many trees are planted each year.

A. what, other than　　 B. which, or rather　 C. that, rather than　 D. as, more than

25. If Newton lived today, he _________ by what _______ science and technology.

A. may be surprised, had discovered

B. would have surprised, has been discovered

C. would be surprised, has been discovered　 D. shall be surprised, was discovered