Выбрать правильный вариант 1. what are they doing/do they do at this moment? 2. when i came in, she was reading/she read a book. 3. liz travelled/has travelled to china last year. 4. by 8 o'clock yesterday david had done/was doing his homework. 5. they have swim/have been swimming for two hours already. 6. this train leaves/is leaving at 5 p.m. 7. the exam started/had started by the time i got to class. 8. danny won't phone us until he has/has had more details.