An alarm c--------can tell us the time.最后一个 别见怪啊~~~~~
问题描述：
An alarm c--------can tell us the time.
最后一个
别见怪啊~~~~~
答
clock
alarm clock 闹钟
答
clock
答
clock
闹钟
答
An alarm clock can tell us the time.
一个闹钟可以告诉我们时间.