the teacher wants to know whether we __ in our papers. A had handed in B would hand in C have ha...
theteacherwantstoknowwhetherwe__inourpapers.AhadhandedinBwouldhandinChavehandedinDare...
the teacher wants to know whether we __ in our papers. A had handed in B would hand in C have handed in D are handing in. 为什么选c不选d
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