Modals of probability / deduction.

That girl ______ a science teacher!

• might be

• can't be

• must be

The man _____ postman.

• must be

• might not be

• might be

He ___ a student.

• must be

• can't be

They _____ friends.

• might be

• can't be

• mustn't

I saw him with some animals. He may be a zookeeper or ___ be a vet.

• must

• could

• can't

He loves his work. He enjoys using the scissors and combs to cut hair. He ____ be a hairdresser.

She said she spends a lot of her time at school. Sometimes she has to clean the student's desks. She ______ be a teacher.

He doesn't know how to design a house. He ____ be and architect.

He is always cleaning the hospital. He has to use a broom and a mop. He _____ be a nurse.

I have never seen that boy. He _____ be your boss. He gives you a lot of instructions.