Ответ:

in : winter , in the afternoon, 1984

on : Monday, Saturday evening, August 21st

at: night, noon , breakfast

b. 2 in

3 at

4 at

5 in

6 on

7 at

8 at

9 to

10 in

c. in , at, to, on , in the, at, at, in, on, in