Решить двойной (повторный) определенный интеграл:

1.) Раскройте скобки, употребляя эквиваленты модальных глаголов в
соответствующем времени.
1. Yesterday it was a holiday, so we (to have) to get up very early.
2. Why do you sit at the back of the class if you can't hear welt? You (to be able) to hear better if you sit in the front.
3. I (to be) to visit his firm at 3.30 p.m
4. She (to have) to wear glasses, but only for reading.
5 If you go there next winter, you (to have) to take some warm clothes with you.
6 Before his illness, he (to be able) to work 14 hours a day if he had to.
7. Those who missed classes yesterday (to be) to report to the Dean.