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1. She (to do) her flat the whole day on Saturday.
2. The cat (to drink) all the milk which I (to give) it.
3. You ever (to be) to Piccadilly Circus?
4. He not (to read) Turgenev since he was a pupil.


Ответы и объяснения

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1. She had been doing her flat the whole day on Saturday. (Past Perfect Continuous)
2. The cat drank (Past Simple) all the milk which I had given it (Past Perfect). 
3. Have you been to Piccadilly Circus? (Present Perfect)
4. He has not read (Present Perfect) Turgenev since he was a pupil.