题目内容
--- Is your favorite subject Math?
--Yes, I am good ___it.
| A．to | B．on | C．at | D．of |
C
解析试题分析：be good at表示擅长什么，在某方面好；句意：--- 你最喜欢的科目是数学吗？---是的，我擅长数学。结合句意，故选C
考点：考查介词辨析。
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