第一节单项选择(共17小题；每小题1分，满分17分）
21. Now boys and girls turn to Page and look at the picture in Lesson Three.
A. Fortieth, forty B. Forty, fortieth C. Forty, fortieth
22. 一You must lots of difficulties if you want to make your dreams come true.
——That's true. I will work hard every day.
A. get over B. get off C. get out
23 the af ternoon August 30th, 2009, an earthquake hit Huili.
badly. Many houses fell down.
A. In, of B. On , of C. On, on
