问题详情:
Before he moved to the United States, he _________ English for six years.
A. is learning B. will learn C. has learned D. had learned
【回答】
D
知识点:动词时态与语态
题型:选择题
问题详情:
Before he moved to the United States, he _________ English for six years.
A. is learning B. will learn C. has learned D. had learned
【回答】
D
知识点:动词时态与语态
题型:选择题