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

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

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