I.

1.a

2.d

3.a

4.b

5.a

II.

1.if i didn't wait

2.practice

3.haven't finished

4.has met

5.is knocking

III.

1.to live on the farm.

2.lived here for fifteen years.

3.warm enough for us to go swimming.

4.same age she.

5.Lan if she wanted to visit Dien Bien Phu.

V.

1.She lives in Japan.

2.Yes, they do.

3.After learning, she helps the Pauls with farm work.

4.Yes she does. Because she feels as if she were in here family in Tokyo.

VI.

1.Tet is the most important festival in Vietnam.

2.They were playing tennis at 10.30 yesterday morning.

3. We have known each other since we were ten years ago. 

-----CHÚC BẠN HỌC TỐT-----

Lần sau nên chia nhỏ đề ra em nhé!