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情景对话与语篇 — 英语填空题

人教版·英语(PEP) Unit 2 Ways to Go to School AI 三重审校通过

题目
Mia and Leo are walking to school. The road looks empty, but the traffic light is red. Leo says, “Let’s cross now.” Mia says, “No. At a red light, we must ___.”