(A)根据括号中所给的提示或句意写出单词。

1. Mars is one of nine__________(large bodies in space that move around stars) in our solar system

2.I need to_________（投诉）to the clothes shop.

3. Three Chinese _________（宇航员）have been to space so far.

4. The students on Mars will need o___________ teachers.

5. He is a successful s__________ and he can sell the most books at the bookstore.

(B)根据句子意思，用括号中所给单词的适当形式填空。

6. John is a well-known explorer and he has ____________(explore) many amazing places.

7. In order to___________(prevention) people from killing tigers, she became a volunteer of

Saving Tigers.

8. That lonely old man talks to others____________(rare).

9. Please go on___________(scan) to find the facts and numbers in the passage.