二、单项填空（本题有20小题，每小题1分，共20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。
21. Please be reminded that___________speed limit here is thirty miles per hour.
A. 不填 B. an C. a D. the
22. — Why don’t you get yourself a job?
— That’s______________ said than done.
A. easy B. easier C. easily D. easiest
23. Rachel will have a party tonight. She ______________ it since two months ago.
A. will plan B. planned C. plans D. has planned
24. Both drivers and passengers ______________ wear seat belts while their cars are running on the highway.
A. must B. can C. may D. need
25. — Which colour shirt would you choose, purple or white?
— ___________ , in case I need a change.
A. None B. Both C. Either D. Neither
26. Just __________ your head or simply keeping silent is not acceptable when answering questions in class; you need to talk!
