Mary doesn't do well in swimming.Mary isn't ---- ---- swimmi

你好,同学,很高兴回答你的问题

正确答案：填 good at

即： Mary isn't ( good ) ( at ) swimming.

翻译：玛丽不擅长游泳.

解析：do well in = be good at 擅长...








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Mary isn't good at swimming.

Mary doesn't do well in swimming.
Mary isn't good at swimming.