2. 外语
  3. She hesitated for a______of a second before accepting his challenge to a game of tennis.

She hesitated for a______of a second before accepting his challenge to a game of tennis.

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问题 She hesitated for a______of a second before accepting his challenge to a game of tennis.
选项 A、fiction
B、function
C、friction
D、fraction
答案D
解析 固定搭配。a fraction of意为“一小部分，零点几”，为固定搭配。故答案为D。
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