One of our duties to carry water for the old and sick.A.areB.isC.haveD.has
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One of our duties _____ to carry water for the old and sick.
A.are
B.is
C.have
D.has
试题答案
B

One of our duties _____ to carry water for the old and sick.
A.are
B.is
C.have
D.has
B