—Must we finish the project in a month?—No, you _______. 

---Must I finish doing my homework now, Mum?    ---No, you ________.

–________ you turn down your radio, please? –Yes, I can.

 —Look at the boy running on the ground. Is it David?—It      be him. I saw him go to the teacher’s office just now.

He bought another new car. He _____ a lot of money.