grammarproblem1Hecouldnevernoticeamistakeunlessitwaspointedouttohim,correctisunlesshewasmade.A.ortoB.and/C.but,soD.nor,dosocorrectitwhycan'tIchoosenor

Question

grammar problem1
He could never notice a mistake unless it was pointed out to him, ___correct is unless he was made ___.
A. or to
B.and /
C.but,so
D. nor ,do so
correct it
why can't I choose nor

Answer 1

A.要不是有人把错误指出来,他绝对不会发现.他还得别人来纠正.
or 还..或者
be made to do sth.省略了do sth.