You don''t look well . You ____ have a fever .
A．mightB．canC．shallD．should
A。
肯定句中表示猜測(cè)可用 many 或 might。這時(shí) might 并不指過(guò)去時(shí)間，只是語(yǔ)氣比 may 更婉轉(zhuǎn)。can 表示猜測(cè)常用于否定或疑問(wèn)句中，有時(shí)也可用于肯定句，表示邏輯上的可能性。如：He''s in poor health . He can be ill at any time . (他身體差，隨時(shí)可能鬧病。)
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