B.that
It was ...that 是强调句型,固定搭配
强调句型:“It is(was)+被强调的部分+that(who)+原句其它部分”来强调说话人的意愿:
被强调的部分为“人”时用who,为“物”时用that.
It was on Monday night that all this happened.所有这一切发生在周一晚上.
It's me who he blamed.他怪的是我.注意:被强调部分不能是谓语.
你这句supplies后面的那个that 是关系代词,引导定语从句的,who在这里应该是somebody的意思,在定语从句中作主语,后面填的这个that 后面才是主句,强调的内容是from 引导的介宾短语.该句把It was...that 去掉以后可以写成
The hostess cooked such a nice dinner from only a few supplies that who had bought in the village .