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完成句子 He the classroom now.I saw him playing basketball on the playground a momen

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完成句子 He the classroom now.I saw him playing basketball on the playground a momen

完成句子

He __________(不可能在打扫)the classroom now.I saw him playing basketball on the playground a moment ago.(clean)

试题答案

答案:

解析:

答案:can’t be cleaning

解析:考查情态动词表示推测的用法。cannot意为“不可能”,根据语境可知要用进行时态。