题目内容

It is_______ that I can still remember_______ was discussed at the meeting.
A．sure; whenB．sure; whatC．certain; whenD．certain; what
D

试题分析：句意：我肯定记得大会上讨论过的事。sure的主语必须是人，排除AB，certain的主语可以是人和物，第二空用what，引导宾语从句，因为从句缺主语所以用what，答案D。
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