I ______ to reach the manager for the la...

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

A．triedB．have tried

C．had triedD．have been trying

D 【解析】试题解析：在本句中，有关键性时间状语for the last two hours，故用完成时。而且由后句的意思，可知道此动作在一直进行中。故用现在完成进行时。故选D。句意：我在过去的两个小时里一直都试图联系那个经理，但线路总是繁忙。考点：时态和语态

考点分析：

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