180. We will have a meeting very soon. But date and place _____ yet.

A. are not decided　　　　　　　　　　　　　　　　　　　　　　 B. have not been decided

C. is not being decided　　　　　　　　　　　　　　　　　　　 D. has not been decided

179. When and where to go for the on-salary holiday _____ yet. (2003上海春)

A. are not decided　　　　　　　　　　　　　　　　　　　　　　 B. have not been decided

C. is not being decided　　　　　　　　　　　　　　　　　　　 D. has not been decided

178. As a result of the storm, a large _____ of trees _____ been blown down.

A. number; has　　　　　　 B. quantity; has　　　　　　 C. number; have　　　　　　 D. quantity; have

177. As a result of destroying the forests, a large _____ of desert _____ covered the land. (2001上海)

A. number; has　　　　　　 B. quantity; has　　　　　　 C. number; have　　　　　　 D. quantity; have

176. _____ of the people working here _____ from northern part of China.

A. Two fifth; is　　　　　　 B. Two fifth; are　　　　　 C. Two fifths; is　　　　　　 D. Two fifths; are

175. _____ of the land in that district _____ covered with trees and grass. (2000上海)

A. Two fifth; is　　　　　　 B. Two fifth; are　　　　　 C. Two fifths; is　　　　　　 D. Two fifths; are

174. All these means _____ to prevent the air pollution, but the sky is still not clear.

A. is used　　　　　　　　　　　　　　 B. are used　　　　　　　　　 C. has been used　　　　　　 D. have been used

173. Every possible means _____ to prevent the air pollution, but the sky is still not clear. (2000上海春)

A. is used　　　　　　　　　　　　　　 B. are used　　　　　　　　　 C. has been used　　　　　　 D. have been used

172. Along with the letter was his promise about _____ we were all eager to know.

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

171. Along with the letter was his promise _____ he would visit me this coming Christmas. (2004上海春)

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