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№4.

2) He has been playing tennis since 5:00 pm.

3) It has been snowing for three hours.

4) I haven't seen Susan since 2001.

5) Bill and Richard have been taking karate lessons since March.

6) I have been waiting for a friend outside the cinema for twenty minutes.

7) Tina has been going on holiday to Sanatorini for five years.

8) I haven't seen David for ages.

№5.

1) am writing

2) has happened

3) Do you know...

4) has asked

5) have been waiting

6) have been reading

7) have aalready written

8) want

9) am counting

10) attend

11) am becoming

12) Are you not excited...

№6.

1) have been learning

2) have been

3) hasn't been to

4) hasn't taken

5) have ever been to

the kremlin itslef wasn't called the fire. that was the name of the red square until 17th century because of numerous cases of fire that took place in and near kremlin and other neighbour buildings.

are they your friends? -yes, they are

is he your brother? - yes, he is

can he ride a bike? - no, he can't

do you want to play with the ball? - no, i don't

does she roller-skate well? - no, she doesn't

does your friend want to play the piano? - yes, he does