delighted me most was my son was admitted to Beijing University.A. That, whatB. That, that

delighted me most was my son was admitted to Beijing University.
A. That, what
B. That, that
C. What, that
D. What, what

A. That, whatB. That, that(答案→)C. What, thatD. What, what解析：考查名词性从句。第一空用what引导起主语从句what delighted me most，what在句中做主语。第二空用that引导表语从句，that在句中不充当任何成分，只起引导作用。句意：最让我高兴的是我的儿子被北京大学录取了。故C正确。

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