10. Why don't we go to school by bike every day.

--> Let's ................................................................

11.She is interested in watching television.

--> She likes .........................................................

12. We will probably go to the moon for our summer holidays in 2050.

-->  We might ........................................................

13. We plant more trees. The air is fresher.

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

14. The dog is at side of the cat.

-->  The dog ...........................................................

15. Shall we turn off the tap when we aren't using water?

-->  I suggest .........................................................