He went to Beijing and returned ____ three days.
A. in
B. before
C. later
D. after
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He will return____ three o'clock.
A. after
B. in
C. on
D. at
He wrote the article ____ three days.
A. at
B. in
C. on
D. by
I agree ____ what you said.
A. to
B. on
C. with
D. at
Do you agree____ this plan (arrangement)?
A. at
B. with
C. on
D. to