题目内容
The initials, WWF, () World Wide Fund for Nature.
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Being more intelligent and () than most of his colleagues, he is soon promoted to a higher position.
Mr. Jones has () himself as one of the foremost doctors treating cancer patients.
Running around the corner, Mike () with another boy and both fell down on the floor.
The World Health Organization says that the virus can () from an infected person to another in close contact.
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