We often go to school _______ 8:20 ________ the morning. 
#48756
A
in, at
B
at, in
C
at, on
D
on, in
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——How do you study ______ a test ? ——I study _____working _____a group.
#46999
A
for, in, with
B
for, by, at
C
for, by, with
D
of, in, by
I went to the park ______ yesterday.
#49631
A
on a bicycle
B
by the bicycle
C
in a bicycle
D
by bicycles