Нужно поставить в правильное время 1. parents were worried because they (not hear) from him for a long time 2. i didn't know the answer because i (not read) the book 3. i think scientists (find) a cure for aids by the year 2050 4. ann told her friend that she (win) the competition 5. she (cook) supper when i come home 6. when europeans first arrived in america they thought they (land) in the west indies 7. the boys were cold and hungry because they (walk) a long way 8. by the time i got to the library she (already left). 9. by that moment everyone (take) their seats and was listening attentively