The students ____ on a farm for ten days.Then they ____ to a factory.Though they ____ back at schThe students ____ on a farm for ten days.Then they ____ to a factory.Though they ____ back at school,they still remembered those farmers and workers.A.have stayed; went; wereB.had stayed; go; areC.have stayed; go; have beenD.had stayed; went; were

问题描述:

The students ____ on a farm for ten days.Then they ____ to a factory.Though they ____ back at sch
The students ____ on a farm for ten days.Then they ____ to a factory.
Though they ____ back at school,they still remembered those farmers and workers.
A.have stayed; went; were
B.had stayed; go; are
C.have stayed; go; have been
D.had stayed; went; were