all the kids are crying now,what_ makes them so unhappy?a it is b is it c it is that d is it tha求真相142.20 （此数与问题无关）
问题描述：
all the kids are crying now,what_ makes them so unhappy?a it is b is it c it is that d is it tha
求真相
142.20 （此数与问题无关）
答
选D
上一楼 的答案是错误的，没有注意语气。如果选C的话就成了陈述句了，很明显这里是疑问语气。
这是个强调句，强调的是what。相当于：it is what that makes them so unhappy,而what是一件具0体的事，占了尚未给出。
另外，强调句型如下：
“It is（was）＋被强调的部分＋that（who）＋原句其它部分”
再给你个例句：I went to the park yesterday.
→It was yesterday that I went to the park(强调的是时间yesterday)
→It was the park that I went to yesterday(强调地点the park）
应该差不多了吧。。全是自己打的，满意的话加点分哦。。
答
选C.强调句型,It is...that,强调的部分all the kids are crying now被单独提前了,what是主语从句的连词,代替这个事情的.
句子相当于：It is all the kids are crying now that what makes them so unhappy.