（）We knew nothing about the fire until the fire alarm went___.A.off B.on C.out D.over

分类: 作业答案 • 2021-12-31 11:10:23

问题描述：

答

A.go off （闹钟,警报）发出响声

（ ）We knew nothing about the fire until the fire alarm went___.A.off B.on C.out D.over