第一节 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，并在答题卡将该项涂黑。
21. ____ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.
A. Were B. Should C. Would D. Will
22. Some of you may have finished unit one. _____, you can go on to unit two.
A. If you may B. If you do C. If not D. If so
23. ___ I saw her, she was working in a shop.
A. The last time B. For the last time. C. To the last time. D. In the last time.
24. Andrew wanted to find another boy to be his best friend, but Annie told him ___.
A. not to B not to do C. not do it D. do not to
25. —It’s so hot. What about getting a drink?
—Good idea. It’s my___ .
A. treat B. charge C. trade D. cost
26. Franklin's ability to learn from observations and experience ____ greatly to his success in public life.
A. owned B. contributed C. attached D. related
27. ____ each other for years, they talked almost the whole night and had a wonderful time.
A. Not having seen B. Having not seen C. Not seen D. Not to see
28. I would appreciate ______, to be frank, if the goods could be delivered as soon as possible．
A．you B．that C．it D．myself
29. They are against the plan. For it ____ too much farmland.
