― What’s Carol doing? ― She’s busy letters.A. writ闂備胶鍋ㄩ崕濠氭嚈瑜版帒鐒垫い鎺戯攻鐎氾拷【查看更多】

 

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— What’s Carol doing?

— She’s busy _____________ letters.

A. writing          B. write            C. wrote           D. to write

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