Помогите пожалуйста слова воткнуть в предложенияCan can039;t can

Помогите пожалуйста слова воткнуть в предложения

Can can't can needn't needn't need mustn't can could may must

There are plenty of tomatoes in the fridge. You (. ) buy any.
It's a hospital. You (. ) smoke.
He had been working for more than 11 hours. He (. ) be tired after such hard work. He
prefer to get some rest.
I ( ) speak Arabic fluently when I was a child and we lived in Morocco. But after we moved back to Canada, I had very little exposure to the language and forgot almost everything I knew as a child. Now, I (. ) just say a few things in the language.
The teacher said we (. ) read this book for our own pleasure as it is optional. But we
read it if we don't want to.
( ) you stand on your head for more than a minute? No, I (. ).
If you want to learn to speak English fluently, you (. ) to work hard.