It isn't quite _____whether she will take the advice.A.sure B.right C.certain D.exact 为什么是选C,不能选A,有什么区别呢
问题描述：
It isn't quite _____whether she will take the advice.A.sure B.right C.certain D.exact 为什么是选C,不能选A,有什么区别呢
答
如果it作为形式主语代替从句时,则其后的表语用certain,而不能用sure.如：It isn ' t certain whether he will come here the next day.明天他是否来还不能确定.