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题型：语法填空（单句） 题类：常考题 难易度：普通
冀教版初中英语八年级上册Unit 4 Lesson 20 No stopping!同步练习
点拨：{#blank#}1{#/blank#} 意为"直到……才"。通常主句用一般将来时，从句用一般现在时态。
China is greatly developing the energy from the sun and wind. These new types of energy cost very little and will never {#blank#}1{#/blank#}.
She is the only {#blank#}1{#/blank#} {#blank#}2{#/blank#} in the big fire.
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