You can’t imagine what great difficulty we have ever had ________ with the probl

题干

You can’t imagine what great difficulty we have ever had ________ with the problems.

A．done

B．doing

C．for doing

D．to do

上一题下一题 0.64难度单项选择更新时间:2016-12-09 04:13:52

小学学科试题库

初中学科试题库

高中学科试题库