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Sometimes the boy is a bad-tempered child, but he ____ be quite lovely when he wishes.
A.mayB.canC.shallD.must
B

试题分析:句意:有时候,这个男孩的个脾气很坏的男孩,但是,只要他乐意,他也可能是非常温顺可爱的。can, could表达推测时,一般用于疑问句和否定句中;can用于肯定句中表示一种理论上的可能性,并不牵涉是否真的会发生,在这种用法中can只能与动词原形连用。
点评:情态动词表推测时高考必考点。can多用于否定句中表强烈的否定。must多用于肯定句中,表强烈的肯定。注意没有mustn’t不表否定推测。shall除用于第一、三人称外,还可以用于宣布法律规定的要求。
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