试题详情
单项选择 适中0.65 引用2 组卷929
When the teacher came into the classroom, the students ____ in groups.
A.workB.have workedC.were workingD.are working
2013·北京通州·二模
知识点:work (工作 v.)过去进行时含when、while 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!