—________  you play the piano for us?

—Sorry, I can't play the piano, but I can sing for you.

A. Can           B. Must           C. May              D. Should

--- You play the piano so well. ________ do you have the piano lessons?

--- Once a week.

1. A.
   How soon
2. B.
   How often
3. C.
   How long
4. D.
   How much

—________  you play the piano for us?
—Sorry, I can't play the piano, but I can sing for you

1. A.
   Can
2. B.
   Must
3. C.
   May
4. D.
   Should