III.

1. T  2. F

3. T  4. T

5. F  6. T

7. T  8. F

IV.

1,3,4,5,6,10: must

2,7,8,9: mustn't

V.

1. tallest 

2. easiest 

3. most comfortable 

4. biggest

5. worst

6. most difficult

7. best

8. most indifferent

9. funniest

10. Lessness

C. READING

I.

1. C

2. B

3. B

4. C

5. D

6. B

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III. True or False

1.True

2.False

3.True

4.True

5.False

6.True

7.True

8.False

IV. Complete the sentences

1.must

2.mustn't

3.must

4.must

5.must

6.must

7.mustn't

8.mustn't

9.mustn't

10.must

V. Give the correct form

1.tallest 

2.easiest 

3.most comfortable 

4.biggest

5.worst

6.most difficult

7.best

8.most indifferent

9.funniest

10.least

C.READING

I.Choose the word

1.C

2.B

3.B

4.C

5.D

6.B

Học tốt!!