1. in - in March, in the winter, in 1984.
on - on Monday, on Saturday evening, on 21st August.
at - at night, at the afternoon, at the weekend, at Christmas.
2. 1) in
2) in
3) at
4) at
5) in
6) on
7) at
8) at
9) to
10) in
Объяснение:
In употребляется
С Месяцами (in March, in December)
Со время года( in winter, in summer)
С годами( in 1956, in 2017)
С веками (in the 21st century)
On употребляется
Со днями недели( on Monday, on Saturday)
С датами( on 3rd July, on December 24)
Прилагательное+day (on a cold day, on a rainy day)
С определенной частью дня( on Friday evening)
At употребляется:
Время (at 3 o,clock, at 3 a.m. )
Праздники (at Christmas, at weekend)
В выражениях (at the moment, at night, at present)
A painter will draw a wonderful picture tomorrow
A wonderful picture will be drawn by the painter tomorrow
The rubbish will be taken away.
The cake will be spoilt.
The fairy tale will be written by Mary in a week