摘要： When the bell rang announcing the end of class, students came out . A. by twos and threes B. by two and three C. by two or three D. by twos or threes
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When the bell rang announcing the end of class, students came out _____.
- A.by twos and threes
- B.by two and three
- C.by two and three
- D.by twos or threes