You ___ eat so much junk food; it's not healthy.

• must

• should

• can

• may

She ___ ride a bike when she was five years old.

• can

• could

• must

• should

Which modal verb expresses obligation?

• must

• can

• might

• could

Students ___ submit their assignments on time.

• must

• can

• might

• could

___ you help me carry this bag?

• May

• Must

• Can

• Should

Which modal verb expresses a strong possibility?

It ___ rain later, so take an umbrella.

• must

• might

• can

• shall

You ___ apologize for your mistake.

• could

• should

• may

• can

Which modal verb expresses prohibition?

You ___ park here without a permit.

• must

• can

• may

• must not

He ___ be at home now; his car is in the driveway.

• must

• might

• could

• may

They ___ be on vacation because their house is empty.

• can't

• should

• might

• must