310.All the employees except the manager ____ to work online at home.
A.encourages B. encourage C. is encouraged D. are encouraged
〖答案〗D
〖考点〗本题考查时态和主谓一致。
〖解析〗主语是all the employees(复数) , 而不是the manager, 排除答案A和C；又因all the employees与encourage是被动关系, 要用被动语态, 排除B, 故选D。
311.The mayor of Beijing says that all construction work for the Beijing Olympics _____by 2006.
A. has been completed B. has completed
C. will have been completed D. will have completed
〖答案〗C
〖考点〗本题考查时态。
〖解析〗结合语境, 应用被动形式；by 2006说明该动作现在尚未结束。
