4. ____ the age of sixteen, the British students take GCSE exams in up ____ ten subjects.

　 A. With; at　　 B. In; at　　　 C. At; for　　　　 D. At; to

3. I don't know who decided ____ the theme ____ the Shanghai World Expo.

　 A. on; for　　　 B. about; through　　　 C. into; on　　　 D. through; about

2.The project Katie spent months working ____ was set ____ a stripy colored background.

　 A. in; for　　　 B. with; on　　　 C. on; against　　　 D. about; in

1. According to Qimin Yaoshu, a practical guide _____ farming, if you go______ nature and do　

　 things at the wrong time of the year, you have to do more work and the result will not be so good.

　 A. under; for　　 B. to; against　　 C. at; across　　　 D.to; at