120. Unless _____ to speak, you should remain silent at the conference. (2003上海春)

　 A. invited　　　　　　　　 B. inviting　　　　　　　　　　 C. being invited　　 　　 D. having invited

119. After _____ the museum, we will open it to the public next.

　 A. completed　　　　　　 B. completing　　　　　　　 C. being completed　　　　 D. to be completed

118. When _____, the museum will be open to the public next year. (2002上海春)

　 A. completed　　　　　　 B. completing　　　　　　　 C. being completed　　　　 D. to be completed

117. _____ from a bad headache, he had to follow the doctor’s advice and stay in bed for a couple of days.

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

116. _____ such heavy pollution already, it may now be too late to clean up the river. (2001全国)

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

115. As we joined the big crowd I got _____ among them.

　 A. separated　　　 　　　　　　　 B. spared　　　　　　　　　　　 C. lost　　　　　　　　　　　　　 D. missed

114. As we joined the big crowd I got _____ from my friends. (2001全国)

　 A. separated　　　　　　　　　　 B. spared　　　　　　　　　　　 C. lost　　　　　　　　　　　　　 D. missed

113. Victor apologized for _____ to inform me of the change in the plan. (2004上海春)

　 A. his being not able　 B. him not to be able　　 C. his not being able　　　 D. him to be not able

112. _____ the meeting himself and give them a great deal of encouragement.

　 A. The president will attend　　　　　　　　　　　　　 B. The president to attend

　 C. The president attended　　　　　　　　　　　　　　　 D. The president’s attending

111. _____ the meeting himself gave them a great deal of encouragement. (2003上海春)

　 A. The president will attend　　　　　　　　　　　　　 B. The president to attend

　 C. The president attended　　　　　　　　　　　　　　　 D. The president’s attending