Modal verbs

John's got a cut on his leg. He ..... wash it carefully and put a plaster on.

My brother ..... swim very well. He is the winner.

..... I come in? Yes, you may.

You ..... stop at a red light.

Pupils ..... wear a uniform at school.

You ..... run beside the swimming pool.

I ..... go with you, sorry. I am busy.

You ..... wear a safety vest.

If you want to be strong and healthy, you ..... drink fizzy drinks.

You ..... walk on the grass.