—Our school is so big. We must clean it up as soon as possible.—Don’t worry. ________.
The No. 15 bus stops here, ______?
---Why do you come back so late? ---Because there were too many people in the supermarket, and I had to _____to pay for the things.
This is ___ __ boy. That girl is _______.
We’ll go for a walk if it ___ __ tomorrow.
My best friend visited my house while I __ __ dinner in the kitchen.