It isn't quite___whether she will take the advice.A.sure B.right C.certain D.exact 可以选A吗?

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It isn't quite___whether she will take the advice.
A.sure B.right C.certain D.exact 可以选A吗?

答案是C
sure 与certain 的唯一区别就是:It is certain thatb\不能换成sure
sure的主语只能是人.
如 sb be sure /certain of/ about sth
sb be sure /certain that...
sb make sure / make certain

一般主语为人,所以不选sure