单项选择。
______. Where is the office building? [ ]
A. Excuse me
B. Sorry
C. Hi
D. Hello
答案:A
肛门突然出现暗紫红色痛性肿块可诊断为
A.出血速度快,呕血或便血B.出血速度较慢,便血为主C.出血伴腹痛,高烧D.少量便鲜血E.腹痛、发热、黄疸
They are _____ than rabbits. [ ]
A. cheap
B. cheaper
C. expensive
D. expensiver