The woman,red,was Tom’s mother, who was waiting for him.A. was dressed inB. was dressing i

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A. was dressed in
B. was dressing in
(答案→)C. dressed in
D. dressing in
解析：句意：穿着红色衣服的女人是，汤姆的妈妈，她正在等汤姆。dress后面常接 sb，构成dress sb in +颜色，“穿着…的衣服”，本题中sb做主语了，故用被动形式。同时本句中没有连词，句中已经有了谓语动词was，故dress用非谓语动词形式。