【题目】My sister is good at _________ and _________. ( )
A.dance; skate B.dancing; skating C.dance; skating
【答案】B
【解析】
句意为我妹妹擅长跳舞和滑冰,be good at意为擅长于,为固定搭配,其后接动名词,dance(跳舞)的动名词形式为dacing,skate(滑冰)的动名词形式为skating,AC均不符合要求,故选B。