My classmates _____ our classroom. Look! It’s very clean.
---Look at the machine in the corner. I haven’t seen it before.---It ________ examining the patient.
---________ tall the red building is!---Yes, it’s our new library.
---Your city looks beautiful.---Yes. Lots of trees and grass ________ last year.
The nice T-shirt must be ________, because they both like wearing T-shirts.
---Mike, do you know which CDs belong to ________?--- I’ve no idea. You may ask Alice.