I believe the answer for question three is D.
Answer:
1. You mustn't touch those animals. They're dangerous.
2. We have to take the bus to school. It's too far to walk.
3. The concert is free. You don't have to pay
4. It's late now, I have to go now.
5. You mustn't leave the door open - the cats will come in.
6. You don't have to come if you don't want to. I can go on my own.
7. In Britain you have to drive on the left.
8. You don't have to be very tall to play football.
Explanation:
Yes
Answer:
A verb.
Explanation:
A noun is a person, place, or thing.
A verb is an action supporting the noun.
A noun does an action, that is a verb.
Example:
The couple exercises every single Tuesday.
The couple (noun), exercises (verb)