B1 Unit4 A

What is the main purpose of this reading?

• to discuss how life probably started on earth

• to explain why we might find intelligent life outside of earth

• to describe what life on other planets might look like

Which possible reason for the existence of intelligent life is NOT mentioned?

• Some planets that circle stars might be similar to Earth.

• The universe is too old to have just one planet with intelligent life.

• Some other planets in the Milky Way have water.

According to the reading passage, why was it difficult to search for signs of intelligent life in the past?

• Telescopes weren't powerful enough.

• The distance between planets was too great.

• There were too few trained astronomers.

What does life forms in the last sentence of the passage mean?

• messages

• beings

• planets

Why does Shostak think we will make contact with intelligent life within the next 20 years?

• We will have better technology to receive their messages.

• Bigger telescopes will identify more planets like Earth.

• Intelligent life will finally receive messages that we send to them.

What tool has been used to discover billions of galaxies?

Does Shostak think that beings from other planets have visited Earth?

Besides radio signals, what else could other life forms use to contact us?

You can ______ a friend by email or text message.

• contract

• content

• contact

The astronomers Seth Shostak and Alexandra Barnett believe that ______ in communication with life forms from other planets.

• we will never be

• we will soon be

• we have already been