Sometimes they _play football

问题描述:

Sometimes they _play football
A.are seen to B.are seen
c.will be seen to D.will be seen 说出原因

A
首先sometimes,时态上是可以确定一般现在时,可排除CD .其次,see sb do sth变成被动语态时,后面要加to,也就是sb be seen to do sth...故选A