( )The Greens____at table when I went in

问题描述:

( )The Greens____at table when I went in
A:is sitting B:were sitting C:was sitting D:sat

B ( 根据when I went in,排除A ,而WHEN 引导的状语从句‘当一个动作发生时,另一个动作正在进行,再排除D,主语THE GREENS 是’一家人‘,复数,再排除C)