❏ I .
1) " What is the depth of this well ?"
=> They wanted to know.............................
2) " My father is forty years old "
=> Lan said that...............................
3) " We will leave her tomorrow"
=>They said..................................
❏ II .
a) You ........................ if you work with chemical ( must )
b) If you feel , you .............................. ( ougth to )
c) You............................ if you want to be healthy ( should)
d) He......................... if he wants to be good at English ( should)
e) If you want to go to the cinema , you........................( must)
f) If we suffer from a disease, we..................................( must )