Question

1 ............. 3 o'clock
2 ............. the morning
3 ............. midnight
4 ............. noon
5 ............. the evening
6 ............. half past six

Answer 1

1-at
2-in
3-? (in вроде)
4-at
5-in
6-at 
 
Если так сделать.  3 

Answer 2

1.at
2.in
3.at
4.at
5.in
6.at