题目内容

You don''t look well . You ____ have a fever .
A．mightB．canC．shallD．should
A。
肯定句中表示猜测可用 many 或 might。这时 might 并不指过去时间，只是语气比 may 更婉转。can 表示猜测常用于否定或疑问句中，有时也可用于肯定句，表示逻辑上的可能性。如：He''s in poor health . He can be ill at any time . (他身体差，随时可能闹病。)
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