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; wereB.had stayed; go; areC.have stayed; go; have beenD.had stayed; went; were
网友回答
D解析本题通过三个句子考查时态的用法；根据上下文的联系和语境的暗示，来决定出第一句的动作最先发生，而且有影响，这体现在最后一句中“仍然记着那些工人和农民”，应该用过去完成时；第二句的动作“去工厂”也应该是过去发生的，第三句已经说明“返回学校了”，所以用一般过去时；第三句的动作--返回学校，是个非持续性动作，所以用一般过去时；综合后选择选项D．