Completing all the homework by the dinner, John felt very tired. He all day long.A. was st

发布时间：2020-08-16 11:13:12


Completing all the homework by the dinner, John felt very tired. He     all day long.
A. was studying
B. studies
C. has studied
D. had been studying

网友回答

A. was studying
B. studies
C. has studied
(答案→)D. had been studying
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