When _________a hill, the driver should build up speed early in order to cut down

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When _________a hill, the driver should build up speed early in order to cut down gasoline consumption.

A. approached

B. to approach

C. approach

D. approaching

参考答案:

D本题考查的是现在分词短语作状语对主要动作加以修饰和陪衬的用法。approached都是谓语动词形式,应该用于完整的句子中;aoproach是动词原形;不定式to approach可以作状语,但表示的是行为的目的、结果或原因。题于的意思是:“快到山前时司机应该提早加速以减少汽油消耗。”