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问题: This exercise______difficult______

This exercise______difficult______
A.so, that few of us can do it
B.too, for anyone of us to do it
答案选A,为什么B不可以?

解答:

我先指出上面这位兄台的错误,提问者的is 是漏写了,是吗?我给你解答,B的句子是This exercise is too difficult for anyone of us to do it.是吗
?我先举个例子你看看:The question is easy to answer.和The question is easy to answer it.比较一下,哪个对?看出来了吗?对,第二句多了个it,这个it 完全是多余的因为句子成分一点都不缺.上面的题也是如此,它是一个单句,而so...that句式是复句,所以必须有it 补足成分.懂了吗 ?再有什么问题可以给我发邮件lxf_044074@smail.tongji.edu.cn祝你学习进步 !