1. 用方框中所给词的适当形式填空。每词限用一次。

billion, late, go, make, walk

1. （1） Let me show you how the model spaceship.
3. （2） Have you heard about the news about the earthquake?
5. （3） There are of stars in the Galaxy, and our sun is only one of them.
7. （4） Neil Armstrong became the first on the moon in 1969.
9. （5） The earth around the sun and seven other planets also circle the sun.