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Farmers often employ fertilizer or other special chemicals to _____the growth of crops, as is well-known.

  A. accelerate     B. advance    C. quicken   D. promote

A


解析:

句意: 农民经常使用化肥或化学物质来促进庄稼的生长。根据句意,化肥能提到庄稼的生长速度,则有“动作加快;速度提高;促进生长”之意,符合题意。advance指使进步,发展;前进(to go or move something forward, or to develop or improve something);quicken 指加快速度、速率等promote多指促进发展、贸易、繁荣、谅解或增进友谊等。

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