Helping the old and the weak is a good verture,and (still ),it is necessary for us to do.为什么、
问题描述:
Helping the old and the weak is a good verture,and (still ),it is necessary for us to do.为什么、
答
这是现在分词作主语,所以用is
答
其实就是一种强调,更.,可以不翻译的.
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