问题描述:
The boy's poor health concerned his parents.
He is concerned for her safety.为什么一会+for一会不家
第 2 句字concered是形容次吗 还是被动?
He is concerned for her safety.为什么一会+for一会不家
第 2 句字concered是形容次吗 还是被动?
问题解答:
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