一道英语单选Thinking that her daughter was doing homework,the moth

如果选quickly and gently,应去掉逗号；因为有了逗号,故应选形容词短语quick and gentle 作伴随状语。形容词可作状语,常表示方式、伴随、原因等。现举几例形容词作状语的句子：He went to bed,cold and hungry。He ran up the stairs,breathless。He fell to the ground,dead。Anxious to know the result of the exam,he entered the office without knocking at the door。