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單項(xiàng)選擇題

（）, the metal expands.

A.Heats
B.Heating
C.To heat
D.Heated

你可能感興趣的試題

單項(xiàng)選擇題

Tell your men （）the rules and procedures of working when dismantling the equipment.

A.not to go against
B.don’t go against
C.not go to against
D.to not go against

單項(xiàng)選擇題

（） in the engine room, the motormen could hardly talk each other.

A.To work
B.Working
C.Having worked
D.worked

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