Надо.. а) раскройте скобки, выбрав формы past simple или past progressive. i (not / understand) what they (talk) about. б) раскройте скобки, поставив глагол в подходягцую по смыслуформу будущего времени. don't phone me between 8 a.m. and 12 p.m. i (work). в) выберите правильный вариант: a) we haven't had lunch yet. b) we didn't have lunch yet. г) переделайте предложение в passive voice, сохраняя его об-щий смысл. they cancelled all flights because of fog.
б) Don't phone me between 8 a.m. and 12 p.m. I'll be working.
в) We haven't had lunch yet.
г) All flights were cancelled by them because of fog.