问题详情:
The experiment has been finished, but no one knows what great difficulty I had __ it.
A. making B. made C. to make D. for making
【回答】
A
知识点:非谓语动词
题型:选择题
问题详情:
The experiment has been finished, but no one knows what great difficulty I had __ it.
A. making B. made C. to make D. for making
【回答】
A
知识点:非谓语动词
题型:选择题