Many workers were organized to clear away _ remianed of the World Trade Centre.
题目
Many workers were organized to clear away _ remianed of the World Trade Centre.
A.those B that C.what Dwhere
为啥?
答案
that作关系代词,应代替前面所提到的东西,这里上文没有被替代的词
这个题考的是what 做引导词的一种重要用法
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
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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