Объяснение:
younger
strongest
funnier
friendliest
noisier
nearer
most intelligent
better
poorest
most boring
cheapest
more expensive
1 younger
2 the strongest
3 funnier
4 most friendly(the friendliest) в современном английском возможны оба варианта)
5 noisier
6 nearer
7 most intelligent
8 better
9 poorest
10 most boring
11 cheapest
12 more expensive