He sat______ his head, trying to think of the answer.

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问题 He sat______ his head, trying to think of the answer.

选项 A、scrapping
B、screwing
C、scraping
D、scratching

答案D

解析 近形近义题。四个选项的拼写形式非常相近,但意义差别很大。[A]“废弃,争吵”;选择[B]“加强,鼓舞”[C]“丢弃,拆毁”;[D]“抓,挠,搔”,指人在某种特殊情况下的焦虑行为。题干描述的一个人在思考答案时着急的情形,选项[D]符合题意,是答案。
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