The meeting for a week .A. has finished B. has ended C. has been overD. has been in

问题补充：

The meeting for a week .

A. has finished

B. has ended

C. has been over

D. has been in

答案：

A. has finished

B. has ended

(答案→)C. has been over

D. has been in

解析：句意：会议结束一个星期了。For a week 一周时间，是表示持续的时间状语，往往与现在完成时连用。Finish和end都是瞬间动词，不能与持续时间状语连用；has been over是表状态，可与持续时间状语连用；D选项表述错误，故选C。