II.单项选择（共15小题；每小题1分，满分15分）
21. When the spaceship traveled above，______new looking earth appeared before us，______earth that we had never seen before.
A. a；the B. the；an C. /；the D. a；an
23. The opening ceremony of the Olympic Games will be broadcast ______ this weekend. You can expect an exactly ______ night.
A. alive; lovely B. live; lively C. live; alive D. lovely; lively
