题目内容：

Old people must be look after well and( )politely.A.spoken to B.speak C.spoken D.spoke to 选哪个?为什么?

优质解答

Old people must be looked after well and spoken to politely.
被动语态是be+done的形式,所以look需要用过去分词的形式,speak 用在这里是不及物动词,需要用介词.例如： speak to sb,speak in certain language,speak about sth .
懂了没有?