8. They play about 20 to 30 concerts a year.

9. The audience ate a delicious soup at the end of the concert last week.

10. The musicians buy vegetables at the market.

Make the sentences passive:

8. About 20 to 30 concerts are played per year.

9. A delicious soup was eaten by the audience at the end of the concert last week.

10. Vegetables are bought by the musicians at the market.