Shortly after the accident, two （） police were sent to the spot to keep order. ( 章节：1 难度：1)
- A、dozens of
- B、dozens
- C、dozen of
- D、dozen
正确答案:D
答案解析:有
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Shortly after the accident, two （） police were sent to the spot to keep order. ( 章节：1 难度：1)
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