摘要：4．-Has Sam finished his homework today. Anne? -I have no idea． But he it this morning． A．did B．had done C．was doing D．had done
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—Has Sam finished his homework today?
—I have no idea. He ________ it this morning.
A. did B. has done C. was doing D. had done
查看习题详情和答案>>---- Has Sam finished his homework today?
---- I have no idea. He ________ it this morning.
A. did B. has done C. was doing D. had done
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—Has Sam finished his homework??
—I have no idea. He _____ it this morning.?
A.did?
B.has done?
C.was doing?
D.had done?
查看习题详情和答案>>