is, are, were, attacked, attacking A school of fish ____ being _

is, are, were, attacked, attacking
A school of fish ____ being ____ by sharks.
【正确答案】:is; attacked
【题目解析】:【考点点击】本题考查主谓一致和被动语态。【要点透析】 school of fish常被当作一个整体来看待,作主语时谓语动词用单数,选项中只有is符合;又因fish和 attack之间存在被动关系,所以第二个空选 attacked