4. My father cleans the car every week.
The car _____________________________________________________
5. If you don’t rest yourself, you will be ill.
Unless _________________________________________________
6. How long is it since he left school?
When _________________________________________________
7. Vietnamese students are obligated to wear uniforms when they go to school. (HAVE)
___________________________________________________________
8. You are not allowed to use your mobile phone on the plane. (MUSTN’T)
___________________________________________________________
9. People use a lot of vehicles. The air is polluted.
If ____________________________________________________________
10. He hasn’t got his hair cut for two months.
It has been ______________________________________________________
11. Although Singapore is a developed country, it is not polluted by industry.
Despite ________________________________________________________
12. New Zealand and Australia are both surrounded by the sea.
Both __________________________________________________________