摘要： Some policemen should be sent to them trees. A. prevent; to cut down B. stop; cutting down C. keep; to cut down D. keep; cutting down
网址：http://m.1010jiajiao.com/timu3_id_2539337[举报]
Some policemen should be sent to _____ them _____ the trees.
A. prevent; to cut down B. stop; cutting down
C. keep; to cut down D. keep; cutting down
查看习题详情和答案>>