单选题Look, a group of stu

单选题 Look, a group of students are playing the violin there, ____their teacher as the conductor.A.in front of them standB.in front of them standsC.in front of whom standingD.in front of whom stands

D解析介词+关系代词引导的定语从句，先行词为a group of students，从句是倒装结构其主语为their teacher是单数形式谓语也要用单三形式。看一群学生在那拉小提琴，老师当指挥站在他们前面。 选D

就是这个解释