讲解：
wake up
词组搭配；表示“起床，醒来；叫醒”
I already wake up at 5:30 on most mornings.
我已经能在大多数早上5:30就起床。


get up
词组搭配；表示“（使）起床；安排；举起；站起来；打扮”
They have to get up early in the morning.
他们大清早就得起床。


had better do sth.
固定搭配；表示“最好做某事”
They had better make the most of it.
他们最好充分利用这个机会。


go off
动词词组；文中表示“响起；响”
The thieves ran away when the burglar alarm went off.
防盗警报器一响，盗贼立刻逃走了。


sleep through 
动词词组；表示“未被…搅醒；在…中沉睡不醒”
Some children can sleep through any kind of noise.
有些孩子再怎么吵都照睡不误。


rise and shine
固定搭配；表示“起床”
Tell them to rise and shine please.
请叫他们起床。