题目内容
When I entered the room, they seemed _____ about something.
A. to quarrel B. quarrelling C. to be quarrelling D. quarreled
C
seem + to be doing sth似乎正在做什么。
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题目内容
When I entered the room, they seemed _____ about something.
A. to quarrel B. quarrelling C. to be quarrelling D. quarreled
C
seem + to be doing sth似乎正在做什么。