Sally is busy ______ her homework.
#51173
A
in
B
at
C
with
D
on
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_____ more details , please caII Mr. Zhang ____55560678.
#50280
A
For ; at
B
To ; with
C
For ; in
D
For ; with
Look!  The train is going _______ the tunnel.
#49271
A
across
B
along
C
through
D
round