【題目】 I ______ to reach the manager for the last two hours but the line is always busy.

A. tried B. have tried C. had tried D. have been trying

【答案】D

【解析】試題分析:句意:在過去的兩個小時我一直在努力和經(jīng)理聯(lián)系上,但一直占線。have been trying是現(xiàn)在完成進行時,強調(diào)動作一直在進行。故選D。

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