Ответ:

7-ое задание:

1. Ann and all other students are in the lecture hall. They are doing a test. It started four hours ago. They have been doing it for four hours.

2. Опечатка в выборе! Не writing, а waiting! Peter and Mary walked on to the station half an hour ago. They are waiting for a train. They have been waiting for half an hour.

3.

- Where are you going?

- Oh, hello, Pete. We're off to the theatre.

- Do you go to the theatre often?

- Yes, we usually go there every fortnight. What about you?

- Well, I don't often find time, I'm afraid.

- Bye.

- Bye. Have a good time.

4.

- Ann, it is time to go to the cinema.

- Wait a little. You see I am writing a letter.

- How long have you been writing it? When we begin to write a letter, we first write our own address and the date in the right hand corner.

8-ое задание:

1. How long have you been learning English?

2. What are you doing now?

3. I am writing a test.

4. I have been writing a test for ten minutes.

9-ое задание:

1. I have been studying English since 4th class.

2. We study English twice a week.

3.

- Where is Peter?

- He has been studying now.

Good Luck!