题目

题型：不详难度：来源：

When he was asked suddenly about the matter ,he couldn’t_____an answer at once.

A．come up with

B．look for

C．put up with

D．answer for

答案

       A    

解析

      题意：当他突然被问及那事时，他不能立刻得出答案。come up with“得出答案” look for“寻找” put up with“提出” answer for“负责”