51. With the worldwide oil crisis, the price of oil has been raised ______ 15%.

A. about B. with C. of D. by

52. The lectures, ______ the current international issues, are well received.

A. are covered B. covered C. covering D. to cover

53. Peter is very angry about ______ of the changed timetable.

A. not informing B. not being informed

C. being not informed D. not to be informed

54. It is ______ that terrorism is a great threat to world peace.

A. widely accepted B. widely accepting

C. wide accepted D. wide accepting

55. The house built of stone lasts longer than ____ built of wood.

A. the one B. one C. that D. its

56. E-mail as well as telephones ____ more and more popular in daily　communication.

A. have become B. become C. are becoming D. is becoming

57. This kind of cloth ____ well.

A. washes B. wash C. is washed D. is washing

58. What do you mean ____ saying that you've never heard of it before?

A. in B. by C. as D. with

59. He's an intelligent boy. He ____ made such a foolish mistake.

A. can't have B. may not have C. might not have D. mustn't have

60. Each of the engineers and professors is working hard at their posts, ____ to accomplish the goal as soon as possible.

A. wish B. for wishing C. wishing D. to wish

51. D by加百分数或表示数量的名词，表示"相差的程度"。

52. C

53. B

54. A 副词widely表示比喻含义"广泛地"；而副词wide表示具体含义"宽地，完全地"

55. C不定冠词 a 限定名词时，下文one用来代替；而定冠词the限定名词时，下文that用来代替

56. D

57. A read, start, write等不及物动词加上方式状语或半系动词feel, taste, look等加表语形容词，在英语中是主动形式，而表示汉语中被动意义。

58. B

59. A

60. C