Could, couldn't, must, mustn't, used to

I ________ be on time at school.

• must

• could

• used to

• couldn't

I _________ to walk to school, now I take the bus.

• could

• couldn't

• must

• used to

The butterfly ______ fly when it was a caterpillar.

• used to

• couldn't

• mustn't

• could

I _______ eat in the classroom. It is prohibited.

• must

• used to

• mustn't

• couldn't

________ you ride a bike when you was a baby?

• could

• used to

• mustn't

• couldn't

Cristina __________ eat meat, now she's a vegetarian.

• used to

• could

• couldn't

• must

I _______ to live in Colombia, now Iive in Italy.

• could

• couldn't

• must

• used to

I _______ speak english, now I can communicate with people around the world.

• used to

• could

• couldn't

• mustn't