Light years away. Conditionals.

 If we ______(plant) trees, we _____ (reduce) carbon dioxide in the atmosphere.

If we ______(learn) to respect the environment, our planet_____ (be) a better place to live in.

 If we _____(recycle) paper, we _____(save) our forests.

If we_____(not, buy) products from endangered species, we _____ (help) them survive.

If we ____ (not, leave) taps running, we_____ (save) water.

If we _____(not, leave) all our lights on, we ______ (not, waste) energy.

If he lived near me,

I could join the volleyball team

If this cake didn't have cherries,

The jet.......in the spacecraft makes it fly very fast.

The recent mission sent a .......into space to improve communication systems.

There are billions of stars in our.....

Someone who studies the start

An icy rock travelling through space with a tail of gas