Present passive.Vocabulary.

When is the school bell________?

At the end of each lesson.

What___ tennis balls__of?

Rubber.

Where___ bananas __?

In South America.

What ___ your sister __?

Rose.

Where ____ the cheese ___?

In the fridge.

How __ that magic trick__?

I don't know.

The articles are written by ___.

The pictures are taken by a ___.

The papers are sold by a ____.

A jumper is made of ____.

A car is made of____.

The article are checked by ___.