V.
1)...cleverer...
2)...is more modern...
3)...more busy...
4)...easier...
5)...better...
VI.
1) This book is the most interesting.
2) Planes flies faster than birds.
3) She is the most pleasant girl in class.
4) In winter days are shorter and nights are longer.
5) 22 (twenty second) december is the shortest day in a year.
VII.
1) taller
2) the smartest
3) the best
4) bigger
5) more interesting
6) worse