问题
选择题
It was __________ you had done ________made it possible for you to improve your English.
A．that/ that
B．that / what
C．what/ what
D．what/ that
答案
答案：D
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It was __________ you had done ________made it possible for you to improve your English.
A．that/ that
B．that / what
C．what/ what
D．what/ that
答案：D