– Why you didn’t handed in your exercise paper?–Sorry, but I ____ that it should

题干

– Why you didn’t handed in your exercise paper?
–Sorry, but I ____ that it should be turned in today.

A．didn’t know	B．hadn’t known
C．haven’t known	D．don’t know

上一题下一题 0.64难度单项选择更新时间:2013-06-27 04:31:24

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