1.The listening test isn't as difficult as the reading test. (much)
=>The listening test is more difficult than the reading test.
2.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.
3.Hanoi urban districts are noisier than its suburban areas. (as)
=>Hanoi suburban areas are not as noisy as its urban districts.
4.Why don't we go to Uncle Huan's farm this weekend? (going)
=>How about going to Uncle Huan's farm this weekend?
5.Sarah found it difficult to learn to read in Japanese. (difficulty)
=>Sarah had difficulty learning to read in Japanese.
6.The book was so complicated that we couldn't understand it. (too)
=>The book was too complicated for us to understand.
7.Sandy now doesn't study so diligently as she did in the past. (more)
=>Sandy now studies less diligently than she did in the past.
8.He has no interest in living and working in the countryside. (interested)
=>He isn't interested in living and working in the countryside.