Пожалуйста помогите 6,7

Приложения:

Ответы

Ответ дал: starlight42
0

Ответ:

6 a

7 b

Объяснение:

modal verbs : needn't, have to

passive voice : have been improved, were left

Ответ дал: oleksandrpetrov
0

6. A (needn't, have to)

7. B (have been improved, were left)

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