Gmat语法题114.Starfish,withanywherefromfivetoeightarms,haveastrongregenerativeability,andifonearmislostitquicklyreplacesit,sometimesbytheanimalovercompensatingandgrowinganextraoneortwo.(A)onearmislostitquicklyrepl

Question

Gmat语法题
114.Starfish,with anywhere from five to eight arms,have a strong regenerativeability,and if one arm is lost itquickly replaces it,sometimes by the animal overcompensating and growing an extra one or two.
(A) onearm is lost it quickly replaces it,sometimes by the animal overcompensatingand
(B) onearm is lost it is quickly replaced,with the animal sometimes overcompensatingand
(C) theylose one arm they quickly replace it,sometimes by the animal overcompensating,
(D) theylose one arm they are quickly replaced,with the animal sometimesovercompensating,
(E) theylose one arm it is quickly replaced,sometimes with the animalovercompensating,

Answer 1

选B.
如果可以选两个,那么E也可以.如果只选一个,那么B比E好,因为E的代词变换显得很累赘.
如果选A或C,主语都还是starfish,和整个句子的主语一致,后面没有必要出现the animal.B选项里it指代的是the (lost) one arm,所以后面再说overcompensating的时候要把主语the animal加上.
如果选D,one arm和they（are quickly replaced)数不一致.