1)
1.Will people drive flying cars?
I think yes.
2.Will computers talk?
I guess yes.
3.Will time travel be common?
I think no.
4.Will people live in underwater cities?
I think it's possible.
2)
1.Invent, won't pollute;
2.Comes, will go;
3.Has, will buy;
4.Exercise, will feel;
5.Are, will go.
3)
1.Doesn't rain
2.Will catch
3.Invite
4.Drop
5.Will call