---The box is too heavy to carry. What’s in it? ---Oh, I _________ it ________books.
---What is your father?---__________.
---You look tired.---Yes. I want __________ to bed.
My mother __________ got any brothers __________ sisters.
These apples are small __________ they are sweet.
---Where are you from? ---Li Wei is __________ and we are from __________.