(1)It is the sun that gives off light and heat,which makes ---- possible for plants to grow
A.this B,that C,it D ./
(2)So occupied---with his study that he doesn't have time to do sports
A .is heB, he isC, was heD he was
(3)----- the whole passage,so that you will get ageneral idea of it
Ascanning B to scan C.scan D.Having scanned