Nuclear ______ be really dangerous at times even though it’s a nice energy in general.

A. shall B. should C. can D. Must

C

【解析】

試題分析：考察情態(tài)動詞。A. Shall應(yīng)該；B. Should應(yīng)該，表示責(zé)任上的應(yīng)該；C. Can可能，表理論上的可能性；D. Must一定。該句意思為：核能有時可能真的很危險，即使一般情況下是一個不錯的能量。根據(jù)句意，故選C

考點(diǎn)：考察情態(tài)動詞

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