英语语法：About how many elements _____ make up most of the substances we meet in everyday life?

题目

英语语法：About how many elements _____ make up most of the substances we meet in everyday life?
A.it is which B.what it is C.is it that D.it is that
又强调句,又疑问句,强调句可以做定语从句?这里about只是个副词所以不管它吗?

答案

About how many elements _____ make up most of the substances we meet in everyday life?A.it is which B.what it is C.is it that D.it is that选项是C这是一个强调句型的疑问句.About how many elements is it ...