theybelieveDtheirdutytolookafterthosechildrenwhoseparentsdiedintheflood.A.thisB.thatC.oneD.it非常不解TT题目是书上摘下来的如果错那是书印刷错了？

Question

they believe___D____ their duty to look after those children whose parents died in the flood.
A.this
B.that
C.one
D.it
非常不解T_T
题目是书上摘下来的 如果错那是书印刷错了？

Answer 1

They believe it their duty to look after those children whose parents died in the flood.
A.this 应该是(that)this is,因为要引导从句.
B.that 应该是that it is,也是由that引导宾语从句.
C.one 驴∧＿∧唇不对马嘴,非要用one的话→that it is one of
D.it后面的their duty to lo.是修饰解释it的,
比如:I insist it my right to gain it.