дам 5 звезд правильному ответу

1) my sister is more intelligent than my brother
2)the biggest
3) colder than
4) the best
5)the luckiest
6)the busiest
7) cheaper than
8)harder than
9) better than
10)the hottest
11) the worst
12)easier than
13)the highest
14)cleverer than
15)more useful than
16)the most common
17)the longest
18)older, the oldest
19)the tallest