楼主,你写出来的句子应该是少了一个标点,原来的句子应该是这样的吧：
It was Friday,the 12th,yesterday.
这里the 12th是插入语,是用来对Friday起解释说明作用的,句意是：昨天是周五,是本月的第十二天.
如果对the 12th画线提问,你可以把它解释成：the 12th day of this month后面的逗号没有哦那也是这个意思Friday提问：What was it yesterday?回答：It was Friday yesterday.the 12th提问：What was the date yesterday?回答：It was the 12th day of this month.原题是这样的 It was Friday,the 12th yesterday.(Friday,the 12th 画线) ______ _______ yesterday?为什么只有两空呢？我实在想不出答案What was yesterday?如果只有两个空，我想只能这样填吧