—He couldn't have finished his homework
题型:选择题
问题:
—He couldn't have finished his homework last night, _________he?
—No. You see, he is busy doing it now.[ ]
A. has
B. could
C. must
D. did
—He couldn't have finished his homework last night, _________he?
—No. You see, he is busy doing it now.[ ]
A. has
B. could
C. must
D. did