用may，can和must填空．

1．You ________ always come to school on time.

2．________ you speak English or French?

3．We ________ wash our hands before meals.

4．My parents ________ arrive tomorrow.

5．I ________ see the park from the window.

6．You ________ not get down until the bus has stopped.

7．________ you post those letters for me?

8．________ you tell me how to get to the station, please?

9．“Mum, do you think it is going to rain?”

“Well, it ________ rain. There are some clouds in the sky.”

10．________ you come to my birthday party on Friday?