56. Cars play an important role in modern life , but they 　　　　　　also cause many problems like air pollution.

　 A. should　　　　 B. can　　　　　　 C. must　　　　　　 D. will　　

55. Work on Rome’s Palatine Hill has turned up a series of discoveries, including 　　　　might be the underground cave .

　 A. what　　　　　 B. which　　　　　 C. that　　　　　　 D. while　　

54. ­­-- What’s up ,Mary?

　 --I’m worried about the interview I had yesterday.

　 --　　　　 　,and let’s keep our fingers crossed and hope for the best.

　 A. Come on　　　 B. No wonder　　　 C. Get ready　　　　 D. No problem　　

53. -- You finally made it , didn’t you ?

　　 --Yes ,　 　　　　 　your help , I would have not succeeded.

　 A. but for　　　 B. except for　　　 C. but that　　　　 D. thanks to　　

52. Along with the increasing number of the Chinese students in Australia, 　　　　　　David Irvine , they 　　　　　　the role of a bridge for the link-up and exchange between the two countries.

　 A. expressed; had played　　　　　 B. expressing ; have been playing

C. expressed; are playing　　　　　 D. expressed ; are being played　　　

51. It is a common theme in many fiction stories that the world may one day be 　　　　　　by insects.

　　 A. broken in　　 B. run over　　　 C. taken over　　　　　　 D. filled in　　

50. Evidence came up 　　　　　　　specific speech sounds are recognized by babies as young as 6 months old.

　　 A. what　　　　 B. which　　　　 C. that　　　　　　　　 D. whose　　

49. Britain’s press is unusual in　　　　 　it is divided into two very different types of newspaper : the equality press and the popular press.

　　 A. how　　　 B. what　　　 C. which　　　　　 D. that