2. 外语
  3. The announcement that ____________(他们成功地克隆)an adult mammal caught the attention of the world.

The announcement that ____________(他们成功地克隆)an adult mammal caught the attention of the world.

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问题 The announcement that ____________(他们成功地克隆)an adult mammal caught the attention of the world.
选项
答案they have succeeded in cloning
解析
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大学英语四级

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