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1. Anyone out there?
2. Life on the Earth
3. The sun and other stars
4. The stars at night
Read the passage quickly and choose the best title.
外太空有人吗？
Tip 1:We can often find the main ideas in the first and the last paragraph.
Read Para.1 and answer the two questions?
Hundreds of millions of years.
No, we haven’t yet.
How many years has there been life on the earth?
Have we found life on any other planets so far?
Watch the video of Para.2 and try to put the following words in the order from “small” to “large”.
galaxy, planet, solar system, star, universe
Read Para.2 and answer :
Why haven’t we found life so far?
Because none of them has an environment like that
of the earth.
planet< star< solar system Read Para.3 &4,then try to tell what scientists have done to explore(探索）the universe. Scientists have discovered many other galaxies in the universe. They have sent spaceships to travel outside the solar system. Scientists have sent spaceships to the planet Mars … Read Para5 and answer the question : What does the word “communicate” mean? We don’t know the answers…yet Answer the question of the title. A. B. C.