She has an advantage over you .It is ___ (sure/certain) that she will beat you at the match.
问题描述：
She has an advantage over you .It is ___ (sure/certain) that she will beat you at the match.
答
certain
这里是固定的结构：it is certain.
不可以用sure代替.be sure +that从句 对吗？形式主语it引导的it is certain that 句子，certain不可以用sure替代，主语是人什么的可以替换。