﹣Why are the windows so dirty? ﹣Because we __________ them for a long time. A．have cleaned B．haven’t...
2023-01-05 10:04:55 44次 2014-2015学年山东滕州市九年级学业水平考试模拟英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
﹣Why are the windows so dirty?
﹣Because we __________ them for a long time.
A．have cleaned
B．haven’t cleaned
C．didn’t clean
本题链接：
