【題目】So far, almost every possible means ______to provide accommodation and medical rescue for the people in the flood-stricken area.

A. were tried B. was tried

C. have been tried D. has been tried

【答案】D

【解析】

試題分析:考查時態(tài)。根據(jù)句首so far可知,這個動作是從過去一直持續(xù)到現(xiàn)在的,而且還可能繼續(xù)下去,應(yīng)該選用現(xiàn)在完成時,句意:到目前為止,幾乎所有可能為災(zāi)區(qū)居民提供住宿、和醫(yī)療援助的辦法都被試過了。根據(jù)句意可以判斷, 故選D。

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