问题
选择题
Our classroom is very clean. Do you know who＿＿cleaned it﹖
A．was it that
B．it was that
C．was it who
D．he was
答案
答案：B
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Our classroom is very clean. Do you know who＿＿cleaned it﹖
A．was it that
B．it was that
C．was it who
D．he was
答案：B