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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He was _______ with breaking _________ several computer systems.
#48316
A
charging; on
B
to charge; in
C
charged, into
D
charges; to
 Do you often chat_______ your friends_______ the Internet?
#47534
A
to; on
B
with; with
C
to; with
D
with; on