4. How did a community chief help Stafford and Cho? a. He showed them where to go. b. He agreed to stop the attacks if they left. c. He explained to isolated communities that they weren't a threat. d. He paid the native people so that they wouldn't harm them. 5. What was the main reason that made Stafford go on this expedition? a. He wanted to be the first to walk the Amazon. b. He wanted to save the rainforest from destruction. c. People believed he couldn't do it. d. He needed to prove something to himself.

1. Did you go to the museum yesterday?

2. What happened on coming home?

3. How long did a strong wind blow?

4. Why did you go for a ride?

5. Our country produces much oil, doesn't it?

6. Did boy saw a plane in the sky&

7. What will they discuss?

8. What did they select?

9. How long did he wait for her?

10. Joan has a bath in the evening, doesn't she?

11. Will they met him at the concert?

12. Are they going to leave school this year?

13. What does she have to do every morning?

14. How many volley-ball games did he see last week?

15. He liked to read a book before going to bed, didn't he?

16. Should we wait for him here?

17. Did she have to sit up late yesterday?

18. What have you learn about today?

19. What shall we reach in ten minutes?

20. You are not free now, aren't you?

21. Is this book much read?

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