Have to - Don't have to

Do astronauts _____________study a lot?

Yes, they do.

• have to

• has to

My dog ______________ sleep outside.

My dad won't let him in at night.

• has to

• doens't have to

Answer explanation

We use HAS TO with HE, SHE or IT.

The dog (it) has to sleep outside.

You ____ wear helmet when you ride a motorcycle.

• don't have to

• have to

• has to

• doesn't have to

Answer explanation

Usamos HAS TO para She, He or IT.

Zookeepers____ understand animal behavior.

• have to

• has to

• don't have to

A vet ____ talk to animals.

• has to

• doesn't have to

A chef _____ be fast.

• have to

• has to

• don't have to

Teachers _____ wear a uniform.

• have to

• has to

• don't have to

Firefighters ______ wear protective clothing when they are putting out fires.

• have to

• don't have to

You (a)   be rich to be happy.