Question

【题目】Never lie to your friends. Once you lose their trust，it is impossible to win it .

Answer 1

【答案】ack
【解析】句意：永远不要欺骗你的朋友。一旦你失去了他们的信任，就不可能赢回它。win back，固定搭配，“把…争取过来，赢回”。因此填back。