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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1119

1. He kept his head _____ water when he began to learn swimming, but he raised his head now and then

A.over B.below C.above D.Up
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1.Hekepthisheadwaterwhenhebega