RESPOSTAS
1) Escolha a opção correta:
Must ou Mustn't
a) You MUST eat vegetables.
b) People MUSTN'T smoke.
c) It's late. You MUSTN'T make so much noise.
d) You MUSTN'T be late for school.
e) We MUST be kind to others.
f) He MUSTN'T drive too fast.
g) She MUST clean her room.
h) You MUSTN'T chew gum in class.
i) I MUST help in the house.
j) You MUSTN'T pollute the water.
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