robot 

Every home will have a robot in 100 years.

free time 

He has nothing to do in his free time.

pollution 

There will be more pollutionin the future.

astronaut 

Neil Armstrong is the first astronautto walk on the moon.

space station 

They have built another space station.

apartment 

This apartment is more beautiful than I expect.

rocket 

They planned to launch a rocket to the moon.

moon 

The moon is round tonight.

more 

Give me one more chance, I will success this time.

less 

The more I learn, the less I seem to know.

fewer 

Fewer people have come to wear hat after the war.

Mars 

Is there life on Mars?

Jupiter 

Jupiter is the largest planet.

space shuttle 

The space shuttle landed uneventfully.

digital device 

This is called a digital device.

Internet 

The Internet has changed people’s life.