—I have got a headache.

—No wonder.You ___ in front of that computer too long.

A.work                                  B.are working

C.have been working                     D.worked

 

【答案】

 C

解析:現(xiàn)在完成進行時表示動作從過去某一時間開始,一直延續(xù)到現(xiàn)在,可能還要繼續(xù)下去。根據(jù)所提供的情景“I have got a headache.”可判斷出由于在電腦前連續(xù)工作而造成了頭痛,故選C項。一般現(xiàn)在時表示經(jīng)常性的動作或存在的狀態(tài);現(xiàn)在進行時表示正在進行的動作或存在的狀態(tài);一般過去時表示過去發(fā)生的動作或存在的狀態(tài)。

 

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