问题描述:
while 引导的时间状语从句 和让步状语从句 有什么区别啊?
While living standards have improved,environmental problems have become increasingly severe.
这是时间状语从句 还是让步状语从句啊?
While living standards have improved,environmental problems have become increasingly severe.
这是时间状语从句 还是让步状语从句啊?
问题解答:
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