Ex.1
1. B
2. A
3. B
4. A
5. A
6. B
7. B
8. A
Ex.2
1. B
2. B
3. A
4. A
5. B
Ex.3
1. You should behave politely.
2. Sara is always optimistic and cheerful.
3. A child smiled at me happily.
4. My aunt usually does her shopping at the supermarket.
5. We often hang out at the weekend.
Ex.4
1. too
2. enough
3. too
4. too
5. enough
