Bài 17:cho dạng đúng của tính từ trong ngoặc,so sánh hơn hoặc so sánh nhất   
      1. Football is (popular) sport                         in the world.
      2. Can you think of something (intelligent)                           to say?
      3. It’s (short)                      day of year.
      4. London is (big)                          Birmingham.
      5. This chair is (comfortable)                             that one.
      6. the weather is getting (bad)                              .
      7. Living in the countryside is (peaceful)                       living in the city.
      8. Who is (clever)                         in the class?
      9. That’s (delicious)                          meal I’ve ever hard.
     10. It was (boring)                           speech I’ve ever heard.
     11. She was a very intelligent student.She was (intelligent)                          girl in her class.
     12. It’s very old castle.Experts argued it is (old)                         in Britain.
     13. I’m going to sleep on the sofa.The floor is (uncomfortable)                         , than it.
     14. This new job is (important)                           for me than the last I had.
     15. Living in the countryside is (healthy)                         than leaving in town.
     16. These instructions were (difficult)                           ones I have ever read.
     17. This is the (expensive)                          nesklace I have ever seen: I can’t believe it’s $1,000,000!
     18. The sports car is (fast)                          than the minivan.
     19. This movie is (interesting)                        than the one that we saw last week
     20. My class starts (early)                     in the morning than yours does.