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3. If people dont switch their lights off, they will waste energy.

4. I wish I had a dog.

5. When i arrived, Monica had already left the cafe.

6. Diana said that she couldn't see her car.

7. The invitations will be sent tomorrow.

you must keep silence

you must be good with others

in our school   you can't tell about extra school things

in our school you must not listen to music

when do their office hours begin?

is mr.bell busy all day?

their office hours don't begin at 9 o’clock.

mr.bell is not busy all day.