ПОМОГИТЕ!!!!!!!!!!!!!
Use must/mustn’t, may, can/can’t, should/shouldn’t, need/needn’t.

You ___ talk aloud in the library.

We ___ visit our grandparents more often.

You ___ drive too fast in the city.

She looks pretty sick. I think she ________ go to a doctor.

Hey I'm lost. ________ you help me?

You have such a beautiful voice. You ________ sing for us!

That looks very expensive. It ________ have cost a fortune!

I ________ believe that you failed your test!

I ________ have seen that movie eight times.

I ________ understand what he's saying.