For parents,___ is very important to set a good example to their _英语解答

For parents,___ is very important to set a good example to their children.
A.it B.what C.this D.that
为什么选A?

人气：469 ℃　时间：2019-10-23 06:44:53

解答

A.
it 作形式主语,真正主语是to set a good example to their children.“为他们的孩子树立一个好的榜样”