She is quite familiar the music that they are dancing .
A. to ; to
B. with ; to
C. with ; with
D. with ; 不填
网友回答
A. to ; to
(答案→)B. with ; to
C. with ; with
D. with ; 不填
解析：考察固定搭配。固定搭配sb be familiar with sth某人熟悉某物；dance to the music随着音乐跳舞。句意：她对于他们伴舞的那段音乐很熟悉。本题第二空music提前，that指代先行词作为to的宾语。故B正确。