Ответ:

Ex5 - 1)had to;could; 2)couldn't; had to; 3)had to; couldn't ; could

Ex6 - 2)couldn't; 3)didn't have to 4)had to; 5)had to 6)could; 7)didn't have to

Объяснение:

Ответ:

5)

1.  had to; could

2. couldn't; had to

3. had to; couldn't; could

6)

2. couldn't

3. didn't have to

4. could

5. couldn't

6. had to

7. couldn't

Объяснение: