Deduction&Speculation

Oh, no! I think I _______ have forgotten to take out the trash.

• may

• must

The restaurant is always full. The food _______ be amazing!

• might

• must

Your son got some bad marks. He _____ need some private lessons.

• might

• can't

• must

I have so many things to do. I ______ be able to go out tonight.

• can't

• might not

• must

We still haven't decide were to go next vacation. We _____ go to Europe.

• may

• must

Britney is anti-social and bad-tempered. She ______ have many friends.

• can't

• might not

I'm not certain if it's true or false.

• It may be true.

• It must be true.

I'm almost 100% sure it's false.

• It might be false.

• It must be false.

We had lunch less than an hour. You _____ be hungry!

• must

• can't

• may not

Students and teachers have been living a difficult year. We ______ be exhausted.

• can't

• may

• must