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
网友回答
A. costs
(答案→)B. takes
C. spends
D. needs
解析：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。