So difficult ____that no one could ___ a good solution to it.A．was the problem;

题干

So difficult ____that no one could ___ a good solution to it.

A．was the problem; come up with

B．the problem was; come up with

C．the problem was; put up with

D．was the problem; put up with

上一题下一题 0.64难度单项选择更新时间:2013-10-31 07:36:25

小学学科试题库

初中学科试题库

高中学科试题库