Completa las siguientes oraciones con “must” o “have to”, en presente, pasado, futuro, Present perfect, infinitivo y gerúndio.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
1. I visit my parents this weekend. It's my dad's birthday.
2. I leave the party early last night.
3. We carry our badge at all times at the office.
4. I work far from home for many years so I am used to driving up and down.
5. It was a bad accident. You be more careful in the future.
6. When I was young, I used get up very early.
7. deal with angry customers can be nerve-racking.