單項選擇題

（） that everything in the engine crankcase is correct, start up the crankcase lubricating oil pump.

A.To satisfy
B.To be satisfied
C.After satisfying
D.After being satisfied

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單項選擇題

Cooling （） the engine metals retain their mechanical properties.

A.forces
B.enables
C.makes
D.is able to

單項選擇題

The data to be recorded on this sheet （） the performance of the engine.

A.makes the experts to judge
B.enables the experts to judge
C.make the experts judging
D.enable the experts to judge