【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(guò)去的兩個(gè)小時(shí)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(jìn)行時(shí)，強(qiáng)調(diào)動(dòng)作一直在進(jìn)行。故選D。

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