Question

_at the meeting yesterday is of great importance to the development of our business. A that we ...

_at the meeting yesterday is of great importance to the development of our business. A that we discussed B what we discussed请问答案是哪个啊，为什么呀，谢谢！

Answer 1

选择B
what we discussed at the meeting yesterday 是主语从句
其中we是主语，discussed是谓语，what是引导词作宾语
选项A中的that在名词性从句中不做句子成分，从而导致主语从句句子成分残缺，故不选。

Answer 2

B
本句缺主语
what引导的从句是名词性从句，名词作主语正好啊，意思是：我们昨天会上所讨论的东西、事情
顺便说一下，all that = what，如果A选项是All that we discussed就对了，all that也是名词性从句可作主语

Answer 3

选b，因为这是主语从句，只能用what引导，that不行
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