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I’ve taken someone else’s green sweater by mistakes. It ______ Harry’s. He always wears green..
A.could beB.will beC.mustn’t beD.has to be
A

这题考查情态动词表示猜测的用法,句意是:我错拿了别人的绿毛衣,可能是亨利的,他总是穿绿色的。Could be表示“可能是”。选A。
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