заполните пробелы с правильными предлогами и переведите выражения с предлогами. ( at/ in / on / by / during/ for / till/ until):
1) ____ my stay in London I visited a lot of museums.
2) I must finish my report in History ___ Friday.
3) I have to stay at school __ 7pm.
4) ___ the morning we went to the museum.
5) The homework was so difficult that he finished it only ___ midnight.
6)Tomorrow we'll be busy ___ 5 o'clock.
7) David's work has improved ___ the last month.