单选题：—Has Mr.Tom White arrived ?

题目内容：

—Has Mr.Tom White arrived ?
---- Yes ,already . ______he wait outside or just come in ?A．ShallB．MayC．CouldD．Must

参考答案：

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分类：情态动词题型：单选题

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分类：情态动词题型：单选题

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分类：情态动词题型：单选题