The police ____(be)searching for the lostchild at this time yesterday

问题描述:

The police ____(be)searching for the lostchild at this time yesterday

was 这里是过去进行时 由于police是单数 故只可以用is 或者was 由于句尾有时间状语yesterday 所以用was

were

本题考查单复数形式,
police是个整体名词谓语动词要用复数,再根据时态,因为后面有个yesterday,所以要用过去式,所以答案是were.

were,POLICE是一个整体名词,作为复数。