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Ответ:

Ex 9 :1 must, 2 musn't, 3 musn't

Ex 10:The boy chewed gum.

The Police officer wore a blue uniform

The dogs made a lot of noise

Akbota wore a red cap yesterda

Dana was very quiet

Ex 11 Yes, you can

No, you can't

No, you can't

No, you can't

Объяснение:

В ex 11 стоят + или - Если + пишешь yes, - no