问题
选择题
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
答案
答案：B
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。