EXERCISE 1. Give the correct form of the adjectives and adverbs in brackets:

1. This chair is ..........................………………….. than that one. (comfortable)

2. Your flat is .....................………....... than mine. (large)

3. The weather today is ........................……… than it was yesterday. (hot)

4. The Nile is the ........................……………………….. river in the world. (long)

5. Chinese bicycles are ................…........……………….. than Japanese ones. (bad)

6. Mathematics is ........................…………………...….. than English. (difficult)

7. Ho Chi Minh is the ............................………………. city in Viet Nam. (big)

8. He drives ................................. .. ……………than his friend. (careful)

9. She sings ........................……………………….. in this school. (beautiful)

10. I read ............................……………………….. than my sister. (slow)

11. Grace is ...........................………………….. girl in our class. (old)

12. This exercise is .........................…….…………..than that one. (easy)

13. He is twice .........................…….…………..as you. (fat)

14. Nam is .........................…….………….. student of all. (noisy)

15. My cold is .........................…….………….. today than it was yesterday. (good)

EXERCISE 2. Choose the best option to complete the following sentences:

1. The more she smiles , ................ she becomes.

A. more graceful         B. the most graceful                C. most graceful          D. the more graceful

2. Hotels have developed …………………… restaurants.

A. as rapidly as           B. so rapidly as                       C. as rapid as               D. more rapid

3. Can Tho bridge is the ……………………  one in the South of Viet Nam.

A. long                        B. shortest                               C. longest                    D. longer

4. Albert Einstein’s contributions to scientific theory were ................ those of Galileo and Newton.

A. important than        B. more important                   C. the most important D. as important as

5. Impalas cannot move as ................ cheetahs but they are more efficient runners.

A. faster than              B. fast as                                 C. fast                         D. are fast as

6. Both are informative articles, but this one is ................ .

A. best                         B. the best                               C. most                        D. better

7. She is the .…………  girl in our town.

A. more beautiful        B. beauty                                 C. most beautiful       D. more beautifully 

8. The harder you learn.............

A. The better is your English                                      B. The better will be your English

C. The better becomes your English                           D. The better your English will be

9. Jim is the ................. in his class.

A. clever                      B. cleverest                             C. cleverer                   D. more clever

10. Of the two shirts, this one is ...................

A. the prettiest                        B. the most pretty                   C. prettier                    D. the prettier

11. Your house is ................. mine.

A. as bigger as             B. many times as big as           C. much big as                        D. not many times big

12. Last year it wasn’t as cold as this year.

A. This year it is as colder than last year.                   B. This year it  is colder than last year.

C. This year it isn’t as cold as last year.                      D. This year it isn’t colder than last year.

13. She is older than me.

A. I’m more younger than her.                                   B. I’m as younger as her.

C. I’m more young than her.                                       D. I’m younger than her.

14. The test is not …………………

A. as difficult as it was last month.                            B. so difficult as it was last month       

C. more difficult as it was last month.                        D. Both A & B are correct       

15. The Nile River is ………………… of all.

A. longer                     B. the longest                          C. long                                    D. longest

16. .................. we read, .................. we know.

A. The most/ the most B. The more/ the more            C. Most/ most             D. More/ more

17. It gets  ................... Let’s go swimming.

A. hot and hot             B. the more hot                       C. more and more hot             D. hotter and hotter

18. Peter usually drives  .................. Mary.

A. more fast                B. more fast than                    C. more fast                D. faster

19. The problem seems to be  ..................

A. more serious           B. more serious than               C. more serious as       D. more and more serious

20. Peter can not earn  .................. his wife.

A. as many money as  B. as much money as              C. as many money than    D. as much money than

21. Prices get  ..................

A. high and high         B. highest and highest                        C. more and more high     D. higher and higher

22. The more manufacturers advise, .................. they sell.

A. the most products  B. the products more              C. the more products  D. most products

23. ................. a car is ................. it is.

A. The more expensive/ the comfortabler                   B. The most expensive/ the most comfortable

C. The more expensive/ the more comfortable           D. The less expensive/ the more comfortable

24. Of the five students. Mary is .................

A. more intelligent      B. the more intelligent            C. most intelligent       D. the most intelligent

25. Steel is ................ than wood.

A. more heavy             B. as heavy                              C. heavier                    D. more heavier

26. A super market is …………………… a shopping center.

A. less convenient as                                                   B. less convenient than

C. not so convenient than                                           D. the most convenient as

27. Viet Nam becomes …………………… to foreign tourists.

A. more and most attractive                                       B. the more attractive

C. much and more attractive                                       D. more and more attractive

28. This car is …………………… than mine.

A. less expensive         B. as expensive                       C. expensive                D. not so expensive

29. Tim’s grades are …………………… than John.

A. worse                      B. worst                                  C. as bad                     D. so bad

30. The …………………… we start, the sooner we will be back.

A. early                       B. earliest                                C. earlier                      D. more early

Scientists have long struggled with how to measure the effects of climate change on wildlife. This is especially true for birds flying in and out of coastal areas bordering the Arctic Ocean. In the past, researchers depended mainly on information gathered by satellite to follow the movement of birds and animals. But this method can be costly and result in huge amounts of information, which can be difficult to process.

Now scientists are turning to another kind of technology to help them follow birds and other wildlife. Songbirds are especially difficult to study in the wild. They can fly across thousands of kilometers and their bodies are too small for electronic tracking devices.

A new report tells about a project in which researchers recorded songbirds and then put the sounds into a computer program to be studied. The researchers created machine learning algorithms with the ability to focus on bird calls while ignoring other noises. The algorithm helps improve the likelihood of predicting the correct result. Similar machine learning methods have been used to recognize human speech.