The question came up at the meeting ____ we had not enough money for our research.

题目

The question came up at the meeting ____ we had not enough money for our research.
有that,what,if,whether可选
答案选whether,我想问为什么不能选if或what
有的解析上选that，

答案

这句话的意思是：会议上提出了我们是否有足够的钱来做这个调查的问题.
这句话中we had not enough money for our research作的是The question的同位语,if和whether的一个区别就是if不能用在同位语从句中,所以不用if.
what为关系代词,引导从句时要在从句中充当句子成分,we had not enough money for our research这句话中显然不缺成分 所以也不能用what.
选that也正确,因为that也可以引导同位语从句