用How他的家有多大?（这里是家庭成员多或少）How big is your family?你家有几口人?There are four in my family:My parents,my sister and me.四口人.我的父母、姐姐和我.——I have a big family.我有一个大家庭....打错了，是感叹句，前面用的是what a。。。可为什么用whata感叹句有两个句型 How +形容词+a/an+名词单数+主语+谓语例如：How old a building that is!那是一栋多么破旧的楼房啊！ What+a/an+形容词+名词单数+主语+谓语例如：What an old building that is!那是一栋多么破旧的楼房啊！ What a big family he has！= How big a family he has！ 他家多大呀所以题目填What a但是如果题目big 后面有加 a 就应该填How了