6.The audience _____ so large that no seat was left unoccupied in the great hall.
问题描述：
6.The audience _____ so large that no seat was left unoccupied in the great hall.
空格处为什么选 is 而不是WAS
答
当audience做集体名词时,用作单数.
当audience做个体名词时,用复数.
本句中audience做集体名词讲,再根据时态was left unoccupied是过去时,应填was.