This school is different     others. It has many out-of-class activities.

— _______ we clean the classroom at once?  — No, you _______. You _______ clean it after school. 

It’s nearly eight o’clock. I must hang up and get down to work. My boss________ be here at any moment.

There ______ little water in the river.

---Must I go to medical school and be doctor like you，Dad？--- No, you __________, son. You’re free to make your own decision.