10, it's weeks since you last tidied this room
11, we have looked for a flat for 2 months
12, I haven't been to a night club before
13, this is the first time I have heard such a thing
14, this is the first time noone has challenged his authority
15, it is 2 years since she  left university
16, I've never met such a warm-hearted person like my mother
17, it is over a year since I last saw them
18, it has rained since 2 o'clock
19, it is the first time I have been to the ballet
20, it is 20 years since john and mary moved to edinburgh
21, for 2 months now the police has looked for him
22, this is the first time i have seen a ditier-looking dog
23, it'is hours since mary last rang
24, alan hasn't visited his parents for ages
25, it is over 6 months since john last had his hair cut