问题描述:
when 引导时间状语从句
We ______ (hear) him singing in the next room when we passed.
添heard 还是were hearing
到底是哪个?
We ______ (hear) him singing in the next room when we passed.
添heard 还是were hearing
到底是哪个?
问题解答:
我来补答展开全文阅读