The students forbidden after class in WC are prevented after school.
A. to smoke; to smoke
B. to smoke; from smoking
C. smoking; smoking
D. smoking; to smoke
网友回答
A. to smoke; to smoke
(答案→)B. to smoke; from smoking
C. smoking; smoking
D. smoking; to smoke
解析：考查非谓语动词。第一空forbid sb to do sth;第二空考查prevent sb from doing sth 。句意：禁止学生课后在厕所吸烟以及放学后吸烟。