题目内容：

don't give your child more money...is necessary .为什么用than?which我什么不可以?

优质解答

don't give your child more money than (the money) (which) is necessary
括号里的是可以省略的部分,which作为从句的提示语是可以省略的.而原题如果选了which,意思将难以理解.