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C. Tell your teacher how ‘passive voice’ is made.

D. Read the Conversation and underline all ‘passive voices’.

E. Read the following paragraph and choose the best verb forms.

Many products (are developed/developed) each year. Light bulb, camera,
airplane, and telephone (were invented/invented) by scientists and
inventors. Laptops, smart phones, and tablets (were made/made) by lots
of work. But not all products (are developed/developed) by hard work.
Some inventions (were created/ are created) by accident or scientists’
mistakes. Penicillin, for instance, (was discovered/were discovered)
quite accidentally when Alexander Fleming (was working/ was worked)
on bacteria. Microwave oven also (was invented/invented) during a
scientist’s experiment on energy. More interestingly, some tools and
technologies (are not made/do not make) by scientists at all. Some like
dishwashers and computer games (were made/made) by ordinary people
like workers, housewives and school students.

F. Pair up and talk about the things that happened in the past without
mentioning the doer.

Example: The window was broken.

1.

2.

3.

1 4.
LESSON 5.

G. Go to Part ‘Grammar’ of your Workbook and do A and B.
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