177. Don’t use words，expressions，or phrases _____ only to people with specific knowledge.

A.　being known　　　　　　　　B.　having been known C.　to be known　　　　D.　known

176. Though ______ money，his parents managed to send him to university.

A.　 lacked　　　B.　lacking of　 C.　　lacking　　　　　　D.　　lacked in

175. Quite a few people used to believe that disaster _____ if a mirror was broken.

A. was sure of striking　 B. was sure of having struck

C. was sure to be struck　 D. was sure to strike

174. In order to gain a bigger share in the international market，many state-run companies are striving _____ their products more competitive.

A.　to make　　　 B.　making　 C.　to have made　　　　　　D.　having made

173. - How do you deal with the disagreement between the company and the customers?

　 - The key ______ the problem is to meet the demand ______ by the

　 　 　customers.

A.　to solving；making　　　　　B.　to solving；made

C.　to solve；making　　　　　　　　D.　to solve；made

172. The research is so designed that once _______ nothing can be done to change it.

A.　begins　　B.　having begun　　 C.　beginning　　D.　begun

171. Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.

A.　to see　　　B.　to be seen　　　　　C.　seeing　　　　　D.　seen

170. She will tell us why she feels so strongly that each of us has a role 　　　　　　in making the earth a better place to live.

A. to have played　　　　　　B. to play　 C. to be played　　　D. to be playing

169. Unless 　　　　　　to speak，you should remain silent at the conference.

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

168. __　　the meeting himself gave 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