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【题目】Our country has launched a campaign to ban smoking in public places, which with some heavy smokers.

A. concerns B. was concerned

C. concerned D. is concerned

【答案】D

【解析】D考查时态。句意:我们的国家已经发起了一项禁止在公共场所吸烟的运动,这与一些烟瘾很大的人有关。短语be concerned with“有关,主句用了现在完成时态,which定语从句用一般现在时态,故选D。

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