问题详情:
—Has your friend completed his design?
—Not yet. He _______ on it last night.
A. worked B. has worked C. is working D. was working
【回答】
D
知识点:动词时态
题型:选择题
问题详情:
—Has your friend completed his design?
—Not yet. He _______ on it last night.
A. worked B. has worked C. is working D. was working
【回答】
D
知识点:动词时态
题型:选择题