Choose the best answer

Scientists have been trying to find ___________ of aliens.

Choose the best answer

People will take _________of robots to do household chores.

Choose the best answer

The scientists believe that there might be some planets to .................. human life.

Choose the best answer

Scientists believe that Mars also __________seasons just as the Earth does.

Choose the best answer

There have been many UFO _____________reported.

Choose the best answer

Neptune is bright blue __________it is named after the Roman God of the sea.

Choose the best answer

The prerequisite condition for a/an .................. planet is water supplies, appropriate temperatures and breathable air.

Choose the best answer

It is certain that robots will ___________the quality of our lives.