:change the following sentences into the passive voice. 1. i have already done the purchase. 2. i am checking the price with the cashier now. 3. we will do advertising, and sales will go up. 4. people often do shopping in large trade centers. 5. they sold fish & a chips here last year.

1. The purchase has been already done.
2. The price is being checked now.
3. Advertising will be done, and the sales will go up.
4. Shopping is often done in large trade centers.
5. Fish and chips was sold here last year.