一、单项选择（共15小题；每小题1分，计15分）
在下列各题A、B、C、D四个选项中选择一个能填入题干空白处的最佳答案。
1、---Excuse me, is there book by Mo Yan?
---Yes. It’s on bookshelf over there.
A. a; / B. a; the C. /; the D. the; a
2、Ice is not often seen here in winter as the temperature normally stays zero.
A. up B. down C. above D. below
3、---Finish your homework, you can’t play computer games, Jim.
---All right, Mum.
A. but B. till C. and D. or
