At midnight my roommate closed her books. I studied until 2 A.M.

2024-08-23 06:36:08
英语写作基础(00597)

At midnight my roommate closed her books. I studied until 2 A.M.(compound sentence)
【正确答案】：At midnight my roommate closed her books, but I studied until 2 A.M.
【题目解析】：p14

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