Thereweresomechairsleftover

问题详情：

There were some chairs left over _____ everyone had sat down.

  A. when                     B. until                         C. that                    D. where

【回答】

A

解析：题意是“当大家坐下后，还有一些椅子剩下”。

知识点：状语从句

题型：选择题