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單項選擇題

After the engine is warned, we should（） the turning gear before starting up the engine.

A.take in
B.put in
C.take out
D.put up

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單項選擇題

After passing through the turbine the exhaust gas is conducted out into the（）.

A.intercooler
B.compressor
C.cylinder
D.open air

單項選擇題

After fitting back in place the gear wheels, dont forget （） them.

A.to grease
B.greasing
C.oiling
D.lubricating

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