He is a very careful man, but he ________ make mistakes which seem ridiculous
A．canB．must C．mayD．will
A

試題分析：句意：他是一個(gè)非常仔細(xì)的人，但是他有時(shí)候也會(huì)犯一些看起來非�；奶频腻e(cuò)誤。can用于肯定句中表示一種理論上的可能性，并不牽涉是否真的會(huì)發(fā)生，在這種用法中can只能與動(dòng)詞原形連用，故選A.
點(diǎn)評：can, could表達(dá)推測時(shí)，一般用于疑問句和否定句中；can用于肯定句中表示一種理論上的可能性，并不牽涉是否真的會(huì)發(fā)生，在這種用法中can只能與動(dòng)詞原形連用；could用于肯定句中，語氣比may/ might更弱。can表示理論上的可能性，翻譯為：有時(shí)候會(huì)…
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