Rewrite the sentences in the passive. Then match them with uses of the passive (a-e).

1. Someone has broken the equipment.

2. Firstly, you heat up the liquid.

3. You must wear safety glasses in the laboratory.
4. A very young student won this year's Science Competition.
5. People say that Dr Liu is a brilliant scientist.

a. describing a process ___
b. when we don't know who did something ___
c. what people in general believe, expect, etc. ___
d. polite rules and requests ___
e. if the object is more important than the subject ___

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