You must phone the police when you find any suspicious guy ____the house late at night. ( 章节：8 难度：4)_做题室

单项选择题You must phone the police when you find any suspicious guy ____the house late at night. ( 章节：8 难度：4): A、hanging out; B、hanging up; C、hanging round

正确答案：C
答案解析：
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