一道SAT语法挑错题In1981...In1981BurmesemilitaryofficialsarresteddissidentpoliticalleaderAungSanSuuKyi,therebypreventingherfromleavingBurmaforacceptingtheNoblePeacePrizeinOslo.我觉得没有错,但是答案说foracce

　　一道SAT语法挑错题In1981...

　　In1981BurmesemilitaryofficialsarresteddissidentpoliticalleaderAungSanSuuKyi,therebypreventingherfromleavingBurmaforacceptingtheNoblePeacePrizeinOslo.

　　我觉得没有错,但是答案说foraccepting错了.请问下原因.还有fordoing和todo表目的有什么区别,例如下题

　　Oneofonlyafewvenomousmammals,theslowIoriscoatsthefurofitsyoungoffspringwithtoxic(saliva,whichitprotectsthem)frompredators.

　　(B)saliva,itprotectthem

　　(C)salivatoprotectthem

　　(D)salivaforprotectingthem

　　(E)saliva,theyareprotected