Modals of Necessity 1 - Must, Have got to, Have to

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According to the law, drivers ______________ at stop signs.
1. must to stop
2. must stop
3. must stopping
If you have a pet dog, you _____________ feed it every day or it will die!
1. has got to
2. have got to
3. have got
If Richard wants to become a professional musician, he ______________ every day.
1. has to practise
2. have to practise
3. haves to practise
Son: Mom, I don't want to clean my room. _________________ it right now?
Mother: Yes, right now.
1. Do I must clean
2. Have I to clean
3. Do I have to clean
When a police officer asks to see your driver's license, you _____________ to him/her.
1. have got to show it
2. have got show it
3. must to show it
In order to log on to the Internet, Sally __________ her user I.D.
1. have to enter
2. must enter
3. has got to entering
Mr. Wu: Hi, Mark. Where's your dad?
Mark: Oh, he ______________ to work because there was an emergency.
1. had got to go
2. musted go
3. had to go
Friend: _________________________ pay to see the doctor?
Brother: No, she ________________ because she has medical insurance.
1. Does your sister have to / doesn't
2. Must your sister / musn't
3. Do your sister have to / don't