1.the boys think smoking shows they are older（改成一般疑问句）2.they want to be like them(改为否定句)3.when people start smoking,it is difficult to stop(翻译成英语)4.他们看起来很疲惫（翻译成中文）

1.Do the boys think smoking when shows they are older
2.They don't want to be like them
3.人们一旦开始抽烟就很难戒掉。
4.They look tired

1.Do the boys think smoking shows they are older ？
2.they do not want to be like them。
3.当人们开始抽烟时，就很难停下来了。（意译）
4.they look very tired。

1.Do the boys think smoking shows they are older?
2.They don't want to be like them.
3.人们一开始吸烟,就很难停止
4.They look very tired.