Youcan’timaginewhatgreatdifficultywehaveeverhad
问题详情：
You can’t imagine what great difficulty we have ever had ________ with the problems.
A. done B. doing C. for doing D. to do
【回答】
B
知识点：非谓语动词
题型：选择题
问题详情：
You can’t imagine what great difficulty we have ever had ________ with the problems.
A. done B. doing C. for doing D. to do
【回答】
B
知识点：非谓语动词
题型：选择题
