Bài giải:

EX 1:

1.THE BIGGEST

2.THE THINNEST

3.THE LONGEST

4.THE CLEVER GREAT

5.THE SHORTEST

6.THE BEST

7.THE TALLEST

8.THE COLDEST

9.THE HAPPIEST

10.THE NICEST

EX 2:

1.C

2.C

3.C

4.B

5.B

6.A

7.B

8.C

9.B

10.B

EX 3:

1.THE AMAZON RIVER IS THE LONGEST RIVER IN THE WORLD.

2.EVEREST IS THE HIGHEST MOUNTAIN IN THE WORLD.

3.MY FATHER IS THE TALLEST PERSON IN MY FAMILY.

4.NGOC IS THE BEST IN OUR SCHOOL.

5.BILL IS THE NICEST OF THE CLASS.

6.AUGUST IS THE HOTTEST MONTH OF THE YEAR.

7.THIS RESTAURANT IS THE BEST IN TOWN.

8.PETER IS THE WORST SINGER.

9.WILL SMITH IS THE RICHEST ACTOR.

10.SUSAN IS THE SHORTEST OF THE THREE.

EX 4:

1.MUST

2.MUST NOT

3.MUST NOT

4.MUST 

5.MUST

CHUK BN HOK THẬT GIỎI NHA :))