Question

The police           the murderer everywhere when he suddenly appeared in a theatre.

A．is searching for	B．were searching for
C．a(chǎn)re searching for	D．were searching

Answer 1

B

試題分析：根據(jù)when he suddenly appeared in a theatre.表示過去正在進(jìn)行的動(dòng)作，故用過去進(jìn)行時(shí)；police一般總看作復(fù)數(shù)形式，故用were，所以選B。
點(diǎn)評(píng)：通過時(shí)間狀語，上下句意思和具體語境來確定時(shí)態(tài)。形式為單數(shù)，但意義永遠(yuǎn)為復(fù)數(shù)這類集合名詞包括cattle(牛，牲畜)cattle，people(人)，police(警察)等，其用法特點(diǎn)為：只有單數(shù)形式, 但卻表示復(fù)數(shù)意義，用作主語時(shí)謂語用復(fù)數(shù)；不與 a(n) 連用，但可與the連用(連用)。如：People will laugh at you. 人們會(huì)笑你的。The police are looking for him. 警察在找他。Many cattle were killed for this. 就因?yàn)檫@個(gè)原因宰了不少牲畜。注：表示牲畜的頭數(shù)，用單位詞 head(單復(fù)數(shù)同形)。如：five head of cattle 5頭牛，fifty (head of) cattle 50頭牛。