Unit 5 Look into Science——2023-2024学年九年级英语冀教版寒假巧练习（含解析）

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（5）Unit 5 Look into Science——2023-2024学年九年级英语冀教版寒假巧练习
一、单选题
1.These cakes _____ with chocolate. Have one, please.
A.fill B.filled C.are filled D. were filled
2.She didn't leave the school _____ she worked out this problem.
A. as long as B. until C. since D. while
3. The air in the morning is so f...