Fill in the blanks with must not or need not: 1) You....ring the bell, I have a key. 2) "You....play with matches", said Mother. 3) I ..... go to the shops today. There is plenty of food in the house. 4) You.... strike a match; the room is full of gas. 5) We....drive fast; we have plenty of time. 6) You....drive fast; there is a speed limit here. 7) You....turn on the light; I can see quite well. 8) You....ask a woman her age. It's not polite.