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