the advertisement has been heard ____ five times a day ,which makes people upset

the advertisement has been heard ____ five times a day ,which makes people upset

题目
the advertisement has been heard ____ five times a day ,which makes people upset
the advertisement has been heard ____ five times a day ,which makes people upset
a.to broadcast b.to be broadcast c.broadcasting d.broadcast
为什么 a 不对
答案
考非谓语动词这是一个被动句,分析这种句子一定要还原来看,我们用they作为主语把句子还原成主动句,就是:They has heard the advertisement_____ five times a day.我们知道hear有这样三个用法:hear sb.do sth.,hear...
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