Rules and Safety
Zoo and museum rules · Must, have to, should · And, but, because
Read notices and dialogues about rules
Say what is allowed and not allowed
Use must, have to, should and mustn't
Join sentences with and, but and because
At the zoo gate: buy a ticket, follow the signs
On the road: cross at the zebra crossing
At home: respect your elders
In the library: keep silence
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