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

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

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

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

　 　　 A. widely accepted　　　　　　　 B. widely accepting

　 　　 C. wide accepted　　　　 　　　　 D. wide accepting

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

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

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

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

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

50. Generally speaking, the hard one works, _______.

　 　　 A. the better he gets result　　 B. the better result he gets

　 　　 C. he gets better result　　　　 D. does he get better result

49. Part of the work is to be finished today and ______ by this weekend.

　 　　 A. another　　　 B. the others　 C. the rest　　 D. the other

48. Of all the applicants, ______ do you think is fit for the position?

　 　　 A. who　　　　　 B. whoever　　　 C. whomever　　 D. whichever

47. It is no longer a problem _______ the poor children in this district can go to school.

　 　　 A. that　　　　 B. whether　　　 C. so　　　　　 D. because