It wasn’t until he came back he knew the police were looking for him.A. whenB. thatC. sin

问题补充：

It wasn’t until he came back he knew the police were looking for him.

A. when

B. that

C. since

D. before

答案：

A. when

(答案→)B. that

C. since

D. before

解析：考查强调句型。强调句型：It is/was 被强调成分 that/who 其它成分；强调句型最大的特点是把it is/was that/who去掉，句子仍然成立。本题强调的是时间状语not until he came back.句意“直到他回来，他才知道警察在找他。故B正确。