一、单项填空（共15小题，每小题1分，满分15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。
1. —How about party held in our school hall last Friday?
—I should say it was a great success.
A. a B. an C. the D. /
2. —Excuse me. Is there a flower shop nearby?
—I know . I will take you there.
A. one B. it C. some D. that
3. —Would you like to play tennis with me tomorrow?
—Sure, it rains.
A. since B. but C. unless D. until
