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题型：语法填空（单句） 题类：常考题 难易度：普通
鲁教版（五四制）初中英语九年级Unit 9 Period 2 Section A同步练习
{#blank#}1{#/blank#} {#blank#}2{#/blank#}, we have planted hundreds of trees on the hill.
The volunteers {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} to provide Russia FIFA World Cup with better service.
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