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.

Use must not when something is forbidden. Use need not when something is not necessary.

1) You need not ring the bell, I have a key.

2) You must not play with matches, said Mother.

3) I need not go to the shops today. There is plenty of food in the house.

4) You must not strike a match; the room is full of gas.

5) We need not drive fast; we have plenty of time.

6) You must not drive fast; there is a speed limit here.

7) You need not turn on the light; I can see quite well.

8) You must not ask a woman her age. It's not polite.

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