题目内容
—At weekends, my parents often go cycling with me around the Fishmouth Wetland Park.
—That's great! But my parents are too busy ________ operations to spare me any time.
A.to do B.done C.doing D.do
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题目内容
—At weekends, my parents often go cycling with me around the Fishmouth Wetland Park.
—That's great! But my parents are too busy ________ operations to spare me any time.
A.to do B.done C.doing D.do