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187. The bell______ the end of the period rang,______ our heated discussion.

A. indicating…interrupting　　　 　　　　　　　　　　 B. indicated…interrupting

C. indicating…interrupted　　　　　　　　　　　　　　 D. indicated…interrupted

186. I really appreciate____ to relax with you on this nice island.

A. to have had time　　　　　　　　B. having time

C. to have time　　　　　　　　　　　D. to having time

185. Do let your mother know all the truth. She appears _______ everything.

A .to tell　　　　　　　　　　　　　　　　　　　　　　　　 B. to be told

C. to be telling　　　　　　　　　　　　　　　　　　　　 D. to have been told

184. Finding her car stolen,______.

A .a policeman was asked to help.　 B. the area was searched thoroughly

C. it was looked for everywhere　　 D. she hurried to a policeman for help

183. 　　　 such heavy pollution already, it may now be too late to clean up the river.

　 A. Having suffered　　　 B. Suffering　 C. To suffer　　D. Suffered

182. Prices of daily goods 　　 through a computer can be lower than store prices.

A. are bought　　 B. bought　 C. been bought　　　　　　　 D. buying

181. With a lot of difficult problems　　，the newly-elected president is having a hard time.

A.　settled　　　　　　　　　　　　　　　　　　　　　　 B.　settling

C. to settle　　　　　　　　　　　　　　　　　　　 D.　being settled

180. When　　，the museum will be open to the public next year.

A.　completed　　　　　　　　　　　　　　　　　 B.　 completing

C.　being completed　　　　　　　　　　　　　 D.　to be completed

179. In some parts of London，missing a bus means _____for another hour.

A.　　waiting　B.　　to wait　 C.　 wait　　D.　 to be waiting

178. ______to sunlight for too much time will do harm to one’s skin.

A.　 Exposed　　　　　B.　 Having exposed

C.　 Being exposed　D.　 After being exposed