a Rewrite the sentences using the correct form of can
or can't.
I know how to play the piano. I can play the piano.
1 It's possible for her to meet me after work.
She
2 Please open the door.
you

3 My friend doesn't know how to ski.
My friend
4 Is it OK if I use your car?
I
5 It isn't possible for us to come to your party.
We
please?
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