Many ads aim at teenager.为什么?

Many ads aim at teenager.为什么? Many ads __________________ specifically at teenagers in the modern world.Many ads __________________ specifically at teenagers in the modernworld.(aim) Many ads are aimed specificaly at teenagers.为什么这里ad要用被动语态?为什么不能直接写成many ads aim specificaly at teenagers? many ads are aimed------(special) at teenagers. 这句英语含宾语补足语吗Many ads are aimed specifically at teenagers.很多广告是特别针对青少年的.我认为：are aimed at 是被动短语,“被针对”（青少年）整个句子改成主动：(People) aim many ads specifically 关于被动语态的一道题Many ads are ----(aim)specifically at teenages这道题我知道填aimed可是为什么要用被动语态呢,可不可以用主动语态? aim at I hate too many ads that are ______ at children.troubled aimed pointed served 这句含宾补吗Many ads are aimed specifically at teenagers.这个句子含宾补吗, Many ads__teenagers.A.are aimed at B.aim at 选哪一个?另一个为什么不行? aim to 与aim at 的区别是什么?是aim to ,aim for ,aim at 三个 aim at 的用法 aim at是什么意思啊? AIM AT A SUCCESS aim sth at sb aim and aim at的区别? aim to、aim at、aim for有什么区别 teen