Answer
Page 39 Exercise C
C. Complete the details about these passages and then identify their main idea.
Our Galaxy
1. Detail: A galaxy is a grouping of stars.
2. Detail: There are many other galaxies in outer space.
3. Detail: It is a spiral-shaped galaxy.
4. Detail: The Milky Way looks like a milky white stripe in the sky.
5. Detail: One of the stars in the Milky Way is the sun.
6. Detail: Scientists believe there are about 200 billion stars in it.
Main idea: The Milky Way is our galaxy.
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