根据句意及首字母提示，写出可替代句中下划线部分的短语。
We will be not friends any longer if you copy my homework.  n　　　　　　
Lillian worries about her daughter when she is away, even though she has been old enough to take care of herself.   l　　　　　　
Linda kept a notebook with her in order to put down everything interesting she thought of.  w　　　　　　
They went to bed late last night playing online games. s　　　　　　
Now, many middle school students have fallen into a bad habit — smoking. A