A. running and swimming

B. cook and sing

C. run and dance

D. singing and swimming

【答案】A

【解析】

句意：我的朋友喜欢……。like doing sth喜欢做某事，A跑步和游泳，现在分词，B做饭和唱歌，动词原形，C跑步和跳舞，动词原形，Dswim现在分词拼写错误，故选A.