__(concern) about Tom,the teacher called his parents to find out why he was absent from class.
题目
__(concern) about Tom,the teacher called his parents to find out why he was absent from class.
答案
concerning
用现在分词代替原因状语从句
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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