There are two blackboards ______the wall and two doors ____the wall.
#47414
A
on, on
B
on , in
C
in , on
D
in ,in
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-Where did you go _____ the morning of April 6?-I didn’t come to the office _____ the meeting was over.
#49484
A
in, when
B
at, unless
C
on, until
D
to, though