Question

【题目】(2012·大纲全国) The manager __________ the workers how to improve the program since 9 am.

A. has told

B. is telling

C. has been telling

D. will have told

Answer 1

【答案】C

【解析】考查现在完成进行时用法。根据时间状语since 9 am 可知用现在完成时，排除B和D；现在完成进行时表示一直在进行 (还没有结束) ，符合语境。句意：自从早晨9点起，经理一直在给员工们讲如何改善这一项目。