单项填空
It’s our duty to_______ people_______too many trees.
A.stop; cutting down B.prevent;to cut down
C.keep;cutting down D.make;cut down
单项填空
It’s our duty to_______ people_______too many trees.
A.stop; cutting down B.prevent;to cut down
C.keep;cutting down D.make;cut down
A stop/prevent/keep sb. from doing sth.都表示“阻止某人做某事”,在主动语态中stop...from...和prevent...from...中的介词from可以省略，但keep...from...中的from不能省略。