英语 高一 选择题 简单

被动语态的时态变化与含情态动词形式 — 英语选择题

北师大版·英语 UNIT 8 GREEN LIVING AI 三重审校通过

题目
Choose the correct form to complete the sentence: To reduce waste, this notice must ___ on the recycling bin. A. put B. be put C. is put D. was put