the teacher didn't sit down until he saw every student already ha_英语解答

the teacher didn't sit down until he saw every student already had a chair____
A to sit B to sit down C to sit at D to sit on
原因是什么呢其他选择为什么不能选

人气：298 ℃　时间：2019-09-05 08:45:13

解答

have a chair to sit on.这里考的是介词.sit on a chair.用on才对.