9. ---Why do you look so __________?
---I will have a job interview in a minute. I’m afraid I will mess it up.
A. angry B. crazy C. Nervous
10. ---Look at these dirty rivers.
---We should not _____ our rivers with waste.
A. pollute B. waste C. clean
11. ---I lost my favourite book on my way home.
---__________ ! I hope you can find it.
A. What a pity B. Thank goodness C. What fun
