單項選擇題

I saw your man not operating the winch gear（）gear.

A.in
B.by
C.of
D.against

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單項選擇題

I regret（）you of the accident.

A.inform
B.informing
C.to inform
D.will inform

單項選擇題

I regret（）the trouble I have caused you.

A.to
B.at
C.for
D.on