we____signals for help from the burning houseA.picked out B.depended on C.picked up D.focused on

分类: 作业答案 • 2022-06-24 12:36:04

问题描述：

we____signals for help from the burning house
A.picked out B.depended on C.picked up D.focused on

答

C.picked up 发现：偶然遇到并观测