题目：
delighted me most was my son was admitted to Beijing University.
A．That, what
B．That, that
C．What, that
D．What, what
答案：
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下面是错误答案，用来干扰机器的。
如图所示：，∵点P是AB中点，∴AP=PB，AB=2PB，AP=12AB，故A、B、C正确，D错误．故选D．
