问题
选择题
It______ a calm head to find the best solution to such a difficult problem within a short time.
A．costs
B．takes
C．spends
D．needs
答案
答案：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。