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He has been back        .
#48270
A
since a month
B
for a month
C
for a month ago
D
in a month
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The engineer will return from Macao ____ a few days.    
#50118
A
since
B
in
C
on
D
after
Could I have an early morning call ________six o’clock tomorrow?
#49371
A
on
B
to
C
at
D
in
---How will students study in the future? - -- ____home______ computers.
#49724
A
In；in
B
At；in
C
At；with
D
At：on
It’s kind _______ you to help me with my Math. Now I think it's easy _______ me to learn Math well. 
#47157
A
for , to
B
of , for
C
to , of
D
for, for
Let’s make friends ________ the new girl in our class.
#49534
A
at
B
with
C
to
D
in