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3. Read the examples and complete the rules.

Modal verbs are often used in passive structures. We use: modal verb + be + past participle.

4. Complete the sentences with the correct modal passive forms.

1. A lot of time can be spent on preparing adverts.

2. Mobile phones must not be used during performances at the theatre.

3. A visa may be required for certain countries.

4. When must the photos be sent to the company?

5. You might be given a free ticket for the exhibition.