單項(xiàng)選擇題Please report your position 4 hours()advance.
A.at
B.for
C.in
D.to
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1.單項(xiàng)選擇題Please stow the drums()ends.
A.at
B.in
C.on
D.by
2.單項(xiàng)選擇題Please switch()the power right away.
A.in
B.up
C.on
D.over
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