Модальні дієслова

My sister ________ dance well when she was a child.

I _____ run a kilometer in four minutes.

_____ I open the window, please?

I _____ swim.

I _____ do sport three times a week. 

Mary ______ know him, but I’m not sure. 

He _____ wear a uniform.

There are plenty of tomatoes in the fridge. You ______  buy any.

It’s a hospital. You _____  smoke.

If you want to learn to speak German fluently, you _____  to work hard.

Elephants ______ reach speeds of up to 40 km/h, but _____ run at a gallop.