Question

【题目】The police ______ the murderer everywhere when he suddenly appeared in the theater.

A. is searching for

B. were searching for

C. are searching for

D. were searching

Answer 1

【答案】B

【解析】police此处强调人（警察们），谓语动词应用复数形式；search for 寻找；且从句用的是过去式，主句应用过去进行时。