I)

1, B. Biology

2, D. Haven't finished

3, A. Yourselves

4, D. Carefully

5, B. What

II)

1, Not to stay

2, Had learned

3,  Getting

4, Getting

5, Have lived

III)

1, My sister is at the same age as Lan.

2, In order to buy a new house, he saves a lot of money.

3, Lan told Peter not to touch that cake.

4, We have not seen Tom for nearly 2 years.

5, I asked Nam of he was free that night.

IV)

1, Ho Chi Minh City is.

2, VN exports rice, coffee and many other farm products.

3, Because Vietmese people are friendly and hospitable.

4, Yes.

5, They are trying to build their country into a powerful and prosperous one.

I.

1.B

2.D

3.B

4.D

5.B

II.

1.not to stay

2.was learning

3.getting

4.getting

5.have lived

III.

1.My sister is the same as Lan.

2.In order to buy a new house,he saves a lot of money.

3.Lan told Peter not to touch that cake.

4.We have not seen Peter for nearly two years.

5.I asked Nam if he was free that night.

IV.

1.Ho Chi Minh City is.

2.It exports rice,coffee and many other farm products.

3.Because Vietnamese people are friendly and hospitable.

4.Yes,there are.

5.They have been trying to build their country into a powerful and prosperous one.