He ______ his head, wondering how to solve the problem.

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问题 He ______ his head, wondering how to solve the problem.

选项 A、scrapped
B、screwed
C、scraped
D、scratched

答案D

解析 用手“挠”头是scratch。scrap抛弃,废弃;screw用螺丝钉钉住;scrape刮,擦。句意:他挠了挠头,想知道么解决这个问题。
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