As the immune system weakens, it loses the ability illnesses.A. fightingB. foughtC. to f

发布时间：2020-08-17 11:17:29

As the immune system weakens, it loses the ability      illnesses.
A. fighting
B. fought
C. to fight
D. to be fought

网友回答

A. fighting
B. fought
(答案→)C. to fight
D. to be fought
解析：C　考查非谓语动词。句意：由于免疫系统衰退，它失去了与疾病抗争的能力。表示“……的能力”，要用不定式作后置定语来修饰the ability。
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