Some policemen were sent there to the villagers down the trees.
A. keep; cutting
B. prevent; cutting
C. prevent; to cut
D. stop; to cut
网友回答
A. keep; cutting
(答案→)B. prevent; cutting
C. prevent; to cut
D. stop; to cut
解析：考查短语：prevent/ stop sb /sth form doing sth ，阻止某人某物做某事，form 可以省略，keep sb /sth form doing sth 也是阻止某人某物做某事，但form 不能省略。所以选B。