1. This supermarket isn't as expensive as the one across the street. (less)

This supermarket is less expensive than the one cross the street.

2. The English teacher started teaching at our school three years ago. (least)

The English teacher started teaching at our school at least three years ago.

3. My doctor advised me not to eat in front of the television. (said)

My doctor said that I shouldn't eat in front of the television.

4. You won't pass the exam unless you study harder. (if)

If you don't study harder, you won't pass the exam.

5. Hanoi urban districts are noiser than its suburban areas. (as)

Hanoi suburban areas are not as noisy as Hanoi urban districts.

6. Why don't we go to uncle Huan's farm this weekend? (going)

How about going to uncle Huan's farm this weekend?

7. Sahara found it difficult to learn to read Japanese. ( difficulty)

Sahara had difficulty in learning to read Japanese.

8. The book was so complicated that we couldn't understand it. (too)

The book was too compliccated for us to understand.

9. Sandy now doesn't study so diligently as she did in the past. (more)

Sandy studied more diligently in the past than she does now.

10. The Chinese printed the first books more than a thousand years ago. (by)

The first book was printed by the Chinese more than a thousand years ago