纠结,
Something must be done to ( ) young people ( ) smoke.
A.stop,from B.make,not to C.keep,from D.encourage,not to
A.C貌似都跟doing,而且貌似必须有,不能 省略doing,直接加n..
B 又不能加to .D不能加not,没这个词组.鼓励...说不通的.
纠结.....说下理由...谢.