`I`

1 - k. The schoolyard is clean

2 - d. Mekong River is very long

3 - b. My grandfather is old

4 - e. Unit 20 and Unit 22 are difficult

5 - i. Hoan Kiem Lake is very small

6 - j. Unit 1 is very easy

7 - f. HLB is beautiful

8 - c. Grandchildren are young

9 - g. Mount Fansipan is high

10 - d. The Pacific ocean is deep

11 - a. HCM city is noisy and exciting

`III`

1. Do you have....

2. doesn't do

3. is raining

4. Do you know....? - is

1 - k

2 - d

3 - b

4  -e

5 - i

6 - j

7 - f

8 - c

9 - g

10 - d

11 - a

II

1 Do you have ( câu hỏi HTĐ : Do/Does + S + Vinf )

2 doesn't do ( câu khẳng định HTĐ: S + Vs/es )

3 is raining ( Hiện tại tiếp diễn: S + is/am/are + Ving )

4 Do you know ( câu hỏi HTĐ : Do/Does + S + Vinf )

- is ( câu khẳng định HTĐ: S + Vs/es ; is/am, are + ... )