【題目】Nuclear energy __________ be really dangerous at times even though it's a nice energy in general.

A. shall B. should

C. can D. must

【答案】C

【解析】考查情態(tài)動詞。句意：核能有時真的會很危險。盡管總的來說它是一種很好的能源。shall用作情態(tài)動詞，用于第一、三人稱的疑問句中，常表征求對方的意見；用于第二、三人稱的陳述句中，表承諾、命令、威脅、警告等。should用作情態(tài)動詞，常表應該、應當、居然之意；must用作情態(tài)動詞，表必須。can用作情態(tài)動詞，常表能力，用于肯定句中；如表猜測，常用在否定 句及疑問句中；can還可表“有時會……”。由句意可知選C。

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