Question

【题目】They knock the door and cry, "Trick or treat!" ( )

A. in B. for C. at

Answer 1

【答案】C

【解析】

句意：他们敲门并大喊“不给糖就捣蛋！”根据句意这是短语knock at “敲(门)”。这是固定搭配。故答案为：C。