---The box is too heavy to carry. What’s in it? ---Oh, I _________ it ________books.
—How is it going, John? —__________.
—It’s better to________more nature reserves to help save more animals in danger. —That’s a fantastic idea.
—He got up as early as possible________he could get to school on time.
The________junk food you eat, the________you will be.
— The problem is a bit difficult . — ________ask your teacher for help?