A: (1) CAN you help me with my bag?
T: Of course I (2)CAN . Yes, your bag is too heavy for you.
A: You see, we have 8 lessons today. You know that new books are big and heavy.
T:Do you (3) HAVE to take all of them?
A: I think I (4) NEED . We are writing final tests now and we need all the textbooks.
T: (5) MAY you use your phones during the tests?
A: No, we (6) MUSTN'T.