I think _____ is very important for students to study by themselves in the school or at home.A. it B. this C. that
–I think teenagers should be allowed to go out with their friends in the evening. –, it’s not safe enough.
It is ______ of a problem to be poor than to be dishonest.
I’d like one more apple. It’s red and _______ good.
China a lot in the ten years.
–Look! Someone is cutting a tree on the moon. –It _______ be true, Granny. Our teacher says there is no air there.