Selecting a mobile phone for personal use is no easy task because technology __________ so rapidly

对下列各句使用的修辞方法判断有误的一项是

Not all advertisements on TV are shown for _____ purposes; some are meant to educate people to pay attention to health, environment or safety.

下列各句加点的词活用现象不同的一项是（ ）

Look, Mary looks sad. Let’s go and_______.