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【题目】It’s vital that every piece of equipment ________ be checked before the experiment.

A. wouldB. couldC. shouldD. might

【答案】C

【解析】

考查情态动词辨析。句意:实验前每一件设备都应该被检查一遍是很重要的。A. would将会;B. could能;C. should应该;D. might可能。根据“be checked before the experiment”可知,每一件设备都应该在实验前被检查一遍,故C项正确。

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