英语 高一 选择题 较难

时间状语从句 — 英语选择题

外研社版·英语(高中) Unit 3 Family matters AI 三重审校通过

题目
Choose the correct option to complete the sentence: The travellers had already set up their tent ___ the storm arrived, so they stayed safe all night. A. while B. when C. before D. until