模仿例句改句子.急

模仿例句改句子.急
例句:
1.This dress is long,but that one is______.
This dress is long,but that one is longer.
2.Tom is intelligent,but Bill is______.
Tom is intelligent,but Bill is more intelligent.
1.This book is cheap,but that one is______.
2.This book is expensive,but that one is______.
3.This question is easy,but that one is______.
4.This question is difficult,but that one is______.
只要回答空里的就行了.感激.