Ex.173:
1) is worse than;
2) better than;
3) is bigger than;
4) are cleverer than / are more clever than;
5) is brighter than;
6) are more intelligent than;
7) are more sensible than;
8) are more polite/ politer than;
9) is harder than;
10) are more sensitive than;
11) is more serious than;
12) is cooler than;
13) are more honest than;
14) is more comfortable than;
15) is more elegant than.