单项选择题
—Has Tom finished his homework yet?
—I have no idea;he（）it this morning.
A.did
B.had been doing
C.had done
D.was doing
点击查看答案&解析
单项选择题
—Has Tom finished his homework yet?
—I have no idea;he（）it this morning.
A.did
B.had been doing
C.had done
D.was doing
微信扫一扫,加关注免费搜题