Ответ:

1. This is .a.. pencil.  The pencil is red.

2. She is .a.. teacher. She is our --..  teacher of English.

3. There are .---.. many flowers in your garden. The flowers are beautiful.

4. Did you write .a.. plan? Give me your .--.. plan, please.  

5 ..The.. Black Sea is in .the.. South of Russia.

6. This is .---.. Nick.  Не works as .an.

engineer. Не is .a.. good engineer.

7. There are .---.. some schools in our  street.  The.. schools are new.

8. In summer ...the  sky is blue and ...the sun shines  brightly.

9 ...The. Petrovs are very friendly.

1 O. This is .---.. Ann's book.  

11.  ---...Winter begins in December.

12. What ..a fine day it is today!  

13 --History and-- Computer Science were -- my favourite subjects at school.  

14. I don't know the... way to the... station.

15. Usually 1 get up at ..--  7 o'clock in ...the morning.

16. Will you have ...a cup of ...--- tea?

17 .... Warsaw is ...the capital of Poland.

18. This is ...a book, ...the  book is very interesting.  

19. Do you see ...the sun in ...the sky today?

20. I went to ...the Smirnovs, but they  were not at ...--- home.