Question

【题目】To his ________ (parent) surprise, Peter received the offer from Oxford University.

Answer 1

【答案】parents'

【解析】

句意：让彼得父母惊喜的是，他收到了牛津大学的通知书。to one's surprise令某人惊讶的是，为固定搭配。此处指彼得的父母，应用复数所有格。故填parents'。