Intermediate 5 Modals for speculation

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

• must be

• might be

• can't be

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

• must be confusing

• must confuse

• might be confusing

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

• must be

• could be

• can't be

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

• must not be

• might not be

• can't be

You have been walking for ten hours. You ______ exhausted.

• might be

• can't be

• must be

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

• may not

• can't

• must not

He ______ his son, they look completely different.

• might be

• can't be

• must be