第二部分：英语知识运用(共两节，满分30分)
第一节：单项选择(共10小题，每小题1分)
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. In memory of China's Youth Day, ______ celebration evening took place on our campus. It was _________ success.
A. / ; a; / B. the; the; the C. / ;a; a D. the ;a ; /
22. I hope nothing will prevent you from coming, as we're ________ your visit.
A. attaching to B. applying to C. looking forward to D. paying attention to
23. I'm moving to the countryside because the air there is much fresher than _____
in the city.
A. ones B. one C. those D. that
