1 �two O�clock in the morning.
2 three hours
3 �christmas
4 �two days
5 �ten days
6 �five minutes
7 �2009
8 last winter
9 �16th June
10 �a very short time
11 two weeks
12 �a long time
13 �World War II
14 �seven years
15 �the whole day
16 �an entire week
17 �August
18 �the morning
19 �last night
20 �one day