50. There are many people on the street. Some are standing still _____ others are walking about.

　 A. where　 　　　　　　 　　B. when　 　　　　　　 　　C. while　 　　　　　　 　D. but

49. Mr. Smith, ______ of the ________ speech, started to read a novel.

　 A. tired; boring　　 　　B. tiring; bored　　　 C. tired; bored　　　 D. tiring; boring

48. The reason why he didn’t attend the meeting is______ he _______ late last night and didn’t get up until ten o’clock this morning.

　 A. because; stayed in　 B. why; stayed out　 　 C. for; stayed away　 D. that; stayed up

47. - Can you give an example to show how useful a computer is?

　 - Sure. _______ people get _______ information from it every day

A. A large number of; plenty of　 　　　　　　　 B. The number of; a lot of

C. Lots of; a lot　　　　　　　　 　　　　　　　　　　 D. Many a; a great deal of

46. We were in __________ when we left that we forgot the airline tickets.

　 A. a hurry so anxious　　 　　　　　　　　　　　　　 B. a such anxious hurry　

C. so an anxious hurry　 　　　　　　　　　　　　　 D. such an anxious hurry