1.                   You should use less paper to protect the environment.

→  If I                                                                                                               

2.                   There has been a sharp increase in the number of skyscrapers built in Hanoi this year.

→  The number of                                                                                              

3.                   He suggested visiting Moc Chau to learn about Thai and H‟mong people.

→  What about                                                                                                  

4.                   They believe that touching the head of a Buddha statue is a sign of disrespect.

→  It                                                                                                                  

5.                   It‟s a pity I can‟t get my visa extended.

→  I wish                                                                                                           

6.                   “Please follow my instructions if you want to pass this module,” my teacher said.

→  My teacher told me                                                                                       

7.                   They had been on board before he arrived at the airport.

→  As soon as                                                                                                    

8.                   How long has you possessed that Chanel bag?

→ When                                                                                                           

9.                   “Why do I have to conduct this research?” she asked me.

→  She asked me                                                                                               

10.           He needs to talk to psychologist about his current situation.

→  It is        

11.It was confident of him to say that he was the best student in his school.

→  He was   ………………………………………………………..

12.Our lifestyle has changed considerably since the introduction of Western culture.

→  There has   ………

13.It‟s exciting for me to learn that I can come to visit my friend in Phu Yen next month.

→  I am   ……………………………………………………………………………..

14.Those children need to be taught about how Vietnam has transformed itself.

→  It is   ………………………………………………………

15.She was so rude to shout at his face in the department store.

→  It was   …………………………………….

16.My father was pleased when he learned that I had passed the entrance exam to high school.

→  My father  was pleased ……………………………………….

17.Everybody had gone home when I came to the party.

→  As soon as    ……………………………………………….

18.This country is unsafe to visit during summer vacation.

→  It is   …………………………………………

19.There has been a dramatic increase in the number of people learning English.

→  The number of people    ………………………………………….

20.Phong went to the beach after working hard for a week.

→  After Phong   …………………………………….. …….