问题标题:
Itisdemandedthatthebooks________tothelibraryatonce.A.wouldbereturnedB.bereturnedC.mustreturnD.mustbereturned
问题描述:

Itisdemandedthatthebooks________tothelibraryatonce.

A.wouldbereturned

B.bereturned

C.mustreturn

D.mustbereturned

邓旭玥回答:
  B
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