David, you _____play with the valuable bottle; you_______ break it.

---______ he have been chosen as captain of our school football team? ---Yes, he______. Can’t you see he’s wearing an armband?

Nobody knows for sure how dinosaurs died out 65,000,000 years ago. It _______ because of sudden changes of their living conditions.

There ______ little water in the river.

----Jack, how are you feeling now?----I am much better, Mum, so you ______________  take me to see the doctor.