Điền must hoặc mustn't cho phù hợp

1. It's late at night. You _____mustn't_____ make so much noise.

2. We _____must_____ be home by 9 o'clock. The film starts at 9:15.

3. I _____must_____ finish this essay today. It has to be handed in by tomorrow.

4. Passengers _____mustn't_____ talk to the driver while the bus is in motion.

5. This is a dangerous tour. Children _____must_____ be accompained by an adult.

6. We _____must_____ do more exercise to stay fit.

7. We _____mustn't_____ give up when we are so close.

8. This was a nice evening. We _____must_____ meet again.