新概念英语第一册（美音版）Lesson 112 How do they compare?

The red apple is as sweet as the green one.

My grandfather is as short as my grandmother.

This knife is as sharp as that one.

The yellow car is not as clean as the white car.

The brown bag is not as new as the red one.

This test is difficult.

This test is more difficult.

This is the most difficult test I have ever done.

This book is interesting.

This book is less interesting.

This is the least interesting book I have ever read.

This book is the least interesting I have ever read.



Written exercises 书面练习 A page 228

1 cheaper

2 more expensive

3 easier

4 more difficult