Поставьте глаголы в скобках в нужном времени: will, the future continuous, future perfect or present simple. Air pollution

Air pollution is a big problem, so I think we have to find new sources of energy. In ten or twenty years, we will drive biofuel or solar powered cars. By the end of this decade, mobile phones will have changed a lot. I think they will become much smaller and instead of a screen they will have a holographic projection. When we will be making a call, we will be able to see a hologram of the other person standing in front of us!

Will I have spent a holiday in space by the time I\'m thirty? I certainly hope so! Many scientists believe that in the future people will be able to spend their holiday in special hotels on the moon. It will be the trendiest place for young married couples to spend their honey moon.