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10.Nuclear _____ be really dangerous at times even though it's a nice energy in general.(  )
A.shallB.shouldC.canD.must

分析 核能有时会真的很危险.

解答 答案:C,考查情态动词.shall 用作情态动词,用于一、三人称的疑问句中,常表征求对方的意见;用于二三人称的陈述句中,表承诺、命令、威胁、警告等.should 用作情态动词,常表应该、应当、居然之意;must 用作情态动词,表必须.can 用作情态动词,常表能力,用于肯定句中; 如表猜测,常用在否定句及疑问句中; can 还可表"有时会…"用在肯定句中.依据句中的 at times 可知,句意为:核能有时会真的很危险.故选C.

点评 考查情态动词的用法,注意区分各个情态动词的意思.

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