To keep the air clean, this hospital all the patients in and around it.
A. allows; smoking
B. forbids; to smoke
C. prevents; smoke
D. prohibits; smoke
网友回答
A. allows; smoking
(答案→)B. forbids; to smoke
C. prevents; smoke
D. prohibits; smoke
解析：考查固定词组。固定词组forbid sb to do sth禁止某人做某事； ACD的搭配错误或者与句意不符的。句意：为了保持空气清洁，这家医院禁止病人在内外抽烟。故B正确。