1.My name is Trang
-I.....
2.Are there seventeen boys in your class?
-Does
3.Lan is sitting behind Ba
-Ba....
4.Linh has long black hair
-Linh's......
5.I like English very much
-My......
6.It is wrong of us to throw rubbish.
-we mustn't....
7. Ha Noi is large, Bangkok is large and Tokyo is the largest
-Tokyo is............the three cities
8.It is not good to stay up so late to listen to music.
-You should........
9. How many times a week do you go to your painting club.
-How often...
10.It is essential that you do your homework before going to school. 
-You must...... 
11.Nobody is older than my grandfather in my family. 
-Nobody in Kiet's class...........