题目内容

It______ a calm head to find the best solution to such a difficult problem within a short time.
A．costsB．takesC．spendsD．needs
B
此题考查动词辨析。take在此作“需要”讲，It takes sth.to do sth.“做某事需要……”。句意：这么短的时间内解决这么难的问题需要冷静的头脑。
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