The children,____had played the whole day long, were worn out.
问题描述：
The children,____had played the whole day long, were worn out.
A.all of what
B.all of which
C.all of them
D.all of whom
这个题为什么不能选C呢
答
答案为D.定语从句.一个句子只能有一个主语、一个谓语.The children是主语,后面的一句话为其定语,解释说明主语.为什么不选C如果选择C选项，就形成了两个句子。The childen were worn out .是一个句子，All of them had played the whole day long .又是一个完整的句子。两个独立的句子，不能缠在一起写。老师也就是说 all of them 不能引导从句了？是的，没有连接词是不能引导从句的。如果在前面加and可以选C吗The childen were worn outand all of them had played the whole day long .这样可以老师不是and不能引导两个完整的句子吗？and为连词，可以连接两个句子。例句：The cure for bad teaching is good teachers, and good teachers cost money.解决教学质量差的办法就是请好的教师，但请好的教师是需要花钱的。