1. I can’t  come because I have to help my dad with something.

If…………………………………………………………………………………..

2.The land is polluted.The farmers are unable to grow crops.

If…………………………………………………………………………………………

3. The workers have just built a new bridge here

 A new bridge...............................................................................................................

4. “I will hand in my assignment to the teacher tomorrow”.

  He said......................................................................................................................

5. " How many planets are there in the Solar System?

Phong asked his teacher..............................................................................................

6.Before I went to bed , I had done my homework

After…………………………………………………………………………………………

7. I'm not you, but I think you should recycle these plastic carrier bags.

-> If .........................................................................................................................