摘要：33．He was busy writing a story, only once in a while to smoke a cigarette． A．to stop B．stopped C．having stopped D．stopping
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He was busy writing a story, only ______ once in a while to smoke a cigarette.
A. to stop B. stopping C. to have stopped D. having stopped
查看习题详情和答案>>He was busy writing a story, only ______ once in a while to smoke a cigarette.
A. to stop B. stopping C. to have stopped D. having stopped
查看习题详情和答案>>He was busy writing a story, only ______ once in a while to smoke a cigarette.
A. to stop B. stopping C. to have stopped D. having stopped
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