Modal verbs: probability / deduction 1

Choose the correct modal verb of deduction.

Paul is behaving in a very unusual way. I think he ______ again.

• can drink

• can be drinking

• might be drinking

Choose the correct modal verb of deduction.

I think there ______ a mistake in your tax return. You should check it.

• can't be

• may be

• must be

Choose the correct modal verb of deduction.

If Suzan said that, it ______ true. She never lies.

• might be

• must be

• can be

Choose the correct modal verb of deduction.

Sorry, but I'm not Connor. You ______ me for someone else.

• might be confusing

• must confuse

• must be confusing

Choose the correct modal verb of deduction.

I'm not sure I trust Peter. He ______ the person we think he is.

• might not be

• can't be

• must not be

Choose the correct modal verb of deduction.

You have walked for ten hours. You ______ exhausted.

• can be

• can't be

• must be

Choose the correct modal verb of deduction.

He ______ his son, they look completely different.

• might be

• can't be

• must not be

Choose the correct modal verb of deduction.

There's a bit of traffic, so I ______ arrive in time.

• might not

• must not

• can't

Choose the correct modal verb of deduction.

He ______ be very proud of you right now. You disappointed him.

• must not

• can't

• might

Choose the correct modal verb of deduction.

I wouldn't swim in this river if I were you. It ______ dangerous.

• can be

• could be