помогите пожалуйста)) только не на угад))
 
1. Choose the correct form:
 
1. Lynne was singing/had sung while she was cleaning the windows.
2. Mr Todd was teaching/had been teaching for thirty years when he retired.
3. They had walked/had been walking for hours when they stopped for a rest.
4. Joe was happy. He was winning/had won the first prize in the competition.
5. Alexander Graham Bell had invented/invented the telephone. 
6. We had been buying/had bought the tickets before we went to the theatre.
 
1. Put the verbs in brackets into the correct past tense.
 
1. Joanne (wash) her hair when the phone rang.
2. Princess Diana (do) a lot of work for charity.
3. Sam was in hospital because he (crash) his car.
4. Tom (play) the piano for years before he became famous.
5. The children (clean) the house by the time their parents came.
 
3. Translate the sentences from Russian into English.
 
1. Они посетили Британский музей на прошлой неделе.
2. Я читал интересную книгу, когда мой друг позвонил мне.
3. К тому времени как я приехал на вокзал, поезд уже уехал.
4. Я изучал английский язык два года перед тем как посетил Англию.

1.

1) was singing

2) had been teaching

3) had been walking

4) had won

5) invented

6) had bought

2.

1) was washing

2) did

3) had crashed

4) had been playing

5) had cleaned

3.

1) They visited the British Museum last week.

2) I was reading an interesting book when a friend of mine phoned me.

3) By the time I arrived at the station, the train had left.

4) I had been learning English for two years before I visited England.