试题 试卷
题型：单选题 题类：常考题 难易度：普通
黑龙江省七台河市2018-2019学年七年级下学期英语期末考试试卷
— Once a week.
—Yes，I think so.
—At 2:00 pm. I heard the_____ of the fire engine at that time.
试题篮
"mean(意思是)?
