问题
选择题
They have something common. Both of them are good dancing.
A．in; on
B．in ; at
C．at ; on
D．at ; at
答案
答案：B
题目分析：句意：他们有某些共同点。他们两个都擅长跳舞。in common相同；be good at擅长……。根据介词的宾语，然后根据上面这两个短语判断答案。
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