Modals of Deduction (Must / Can't / Might)

Tom has been working late every day; he __________ be very busy with a project.

• must

• might not

• can't

The children are playing outside in their swimsuits; it ____________ cold today.

• mustn't be

• can't be

• might

Emily has been absent from work for three days; she ____________ on vacation.

• must be

• might not be

• can't be

The traffic is moving very slowly; there ____________ an accident ahead.

• must be

• might

• can't

Mike is a vegetarian, so his dish ____________ contain any meat.

• must

• can't

• might not

The concert tickets are sold out; they ____________ available anymore.

• mustn't be

• can't be

• might not be

Sarah's flight landed an hour ago, but she ____________ out of the airport yet.

• mustn't have

• can't have

• might not have

The sun is shining, so it ____________ raining.

• must be

• might not be

• can't be

There's a long line at the coffee shop; they ____________ a special promotion today, but I am not sure.

• might

• can't be

• must

The teacher is smiling; the students ____________ done well on the test.

• must

• might not

• can't have