Ответ:

6B, 7C, 8C, 9C............................................

Объяснение:

6. Which one is correct?

B) Be always polite to your mates!

7. Complete the sentence.

The library of Congress is a symbol of vital connection between and . C) knowledge, democracy

8. Choose the correct models.

You interrupt people while working. C) mustn't

9. Choose the correct verb.

You can different books from the library. C) borrow