—Hi, Jack!—Hi, Eric! You ________ really quiet, but now you are very outgoing.
He used to _____ with her parents, but now she is used to ____ with her classmates at school.
--- ____ you _____ of the pop singer called Justin Bieber?--- Yes, I have. His voice sounds_____.
I always tell my students _______ on the road because it’s really dangerous.
—Mum, must I stay there the whole day? —No, you .You come back after lunch, if you like.
I think _______ necessary for you _______ breakfast.