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题型：单选题 题类： 难易度：困难
试题来源：黑龙江省哈尔滨市工大附中2024-2025学年七年级上学期开学英语测试卷
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组卷次数：7次 +选题
Change your water heater, {#blank#}1{#/blank#} you {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} too much harmful gas.
—Don't worry. It's only six o'clock by my watch.
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