3. Malaysia has two regions.

=> There are two regions in Malaysia. 

4. I don't know about the time of the meeting

=> No one tells me the time of the meeting. 

5. Please keep silent in the classroom

=> I'rather you kept silent in the classroom. 

6. We can't go out because of the heavy rain

=> We can't go out because it's raining heavily (kh chắc nheee)

7. It's time for you to go to bed

=> It's time you went to bed

8. How old are you?

=> What is your age?