must and mustn't

Choose the correct option to describe the image:

• You must turn off the lights during the days.

• You must take quick showers.

• You must recycle.

• You must walk to school.

You ____________ throw away garbage on the street.

• must

• mustn't

You ---------- be friendly to your grandparents.

• must

• mustn't

You ---------- keep your room clean and tidy.

• mustn't

• must

You must not_____ with fire.

• playing

• played

• plays

• play

You must not _______ on the grass.

• walking

• walks

• walk

• walked

you...

• mustn't turn off the lights

• must turn off the lights

• mustn't turn on the lights

Choose the correct option

• close the faucet

• she must close the faucet

• she mustn't close the faucet

• she shouldn't close the faucet

Choose the correct option

• We must waste water.

• my borther should waste water

• We mustn't waste water

• she close the faucet

The three R's to help the environment are: recycle, reduce and...