问题
选择题
_____ impressed me was the boy’s ability to deal with this kind of difficult physics problem.
A．Which
B．What
C．It
D．That
答案
答案：D
题目分析：考查名词性从句。引导主语从句并在主语从句中做主语。句意：给我留下深刻印象的是男孩在处理这种物理难题时的能力。
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