Przekształć podane niżej zdania w stronie czynnej na zdania w stronie biernej.

Przykład: They collect rubbish twice a week.

The rubbish is collected twice a week.

1 What time do you serve lunch?

2 They grow rice in Vietnam.

3 Alexander Graham Bell invented the telephone in 1876.

4 When did the postman deliver this package?

5 We haven’t downloaded the files yet.