單項選擇題

Hardly had the engine started （） the temperature of the cooling water suddenly rose up to 40℃.

A.then
B.than
C.when
D.after

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單項選擇題

The term “moderate speed” was previously interpreted as meaning a speed which would enable a vessel （）within half the range of visibility.

A.stopping
B.being stopped
C.to stop
D.to be stopped

單項選擇題

The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being （）.

A.open
B.uncover
C.covered
D.closed