微信刷題,考證常用
  • 試題題型【單項選擇題】
試題內容
____ the age of six, he began to play the piano.
  • A. in
  • B. at
  • C. by
  • D. on
  • 參考答案:B
  • 解題思路:at the age of +年齡,固定搭配
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