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
22. ______from the top of the mountain, the village looks like a small box.
A. Seen B. Being seen C. To see D. Seeing
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
24. The scientists are beating their brains, trying to ______ a solution to the problem.
A. look up to B. live up to C. come up with D. keep up with
25. Your _______ as a student will be excellent if you develop a habit of reflecting on how you learn.
A. operation B. performance C. growth D．character
