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most of them travel 40000 miles to a satellite and then back to earth.then back to earth是什么成分

分类: 作业答案 • 2021-12-28 14:59:03

问题描述：

most of them travel 40000 miles to a satellite and then back to earth.then back to earth是什么成分

答

then(时间状语） back to earth 地点状语,修饰travel