I/

vocanic   technical     impatient   adoptee

II/

1.C

2.B

3.A

4.D

III/

1.will learn

2.go

3.use

4.bought

IV/

1.Hoa said that is doing an experiment.

2.Hoa asked me do go for a walk every day

3.He asked me can buy the phone card in the city

4.If we don't waste paper, we save many trees

5.If she were very shy,she couldn't enjoy the party.

II

1. c  2. b (adj )  3. d (expose to : tiếp xúc vs )  4. a

III

1. will have learned  (tương lai hoàn thành )  2. to go (decide to v: quyết định làm gì  )

3. used ( đk loại 2 )  4. had bought ( hành động mua xảy ra trước hành động tìm thấy)

IV

1. he said that they were doing an experiment

2. hoa asked me if i went for a walk everyday 

3. he asked me where he could buy a phone card in that city 

4. if we waste paper, we won't save the trees

5.  if she were't shy, she could enjoy the party.