第二部分：第一节．单项选择（每小题1分）
21. Lorry, _____ university student from America, teaches us _____history of western art.
A. the; a B. an; the C. a; the D. the; /
22.—Could you please buy me an MP4 as well as a digital camera, Mum?
—You can choose _____, not both, my dear.
A. each B. any C. either D. none
23. Studies show that people are more _____to suffer from back problems if they always sit before computer screens for long hours.
A. likely B. possible C. probable D. sure
24. Once you have the _____of weight loss or sleeplessness, stop taking medicine and see your doctor.
A. prescription B. symptoms C. expressions D. aspects
25. When Mom looked back on the early days of their marriage, she wondered how they had managed with _____money.
