Can/ can't

'___ you swim'? 'Yes, I ___'

I'm sorry I ___ help you today, I'm really busy.

Please ___ you buy some milk on your way home? I ___ leave the house because I'm looking after the baby.

I ___ ride a bike but I ___ drive a car.

'Hello, ___ I help you'? 'Actually, no you ___ this restaurant is awful and we've been waiting here for half an hour. We're leaving'.

'___ I go to the bathroom please'? 'Yes, of course you ___.'

I've never been able to eat breakfast in the mornings. I ___ talk to anyone either!

Can I _______ this chair?

______ my friend stay here?