The committee __ over the problem among themselves for two hours.

A. has argued B. has been arguing

C. have argued D. have been arguing

 

D

【解析】

試題分析：本題的關鍵詞是后面的時間狀語for two hours，該時間狀語常常和現(xiàn)在完成時，或者現(xiàn)在完成進行時連用。表示動作從過去發(fā)生一直持續(xù)到現(xiàn)在，而且還在發(fā)生。句義：在兩個小時里，委員會一直都在討論做過問題�，F(xiàn)在完成進行時強調動作的持續(xù)性。故D正確。

考點：考察時態(tài)

 

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