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题型:单选题 题类:常考题 难易度:普通
牛津上海版(试用本)2018-2019学年小学英语六年级上册Module 3 Food and drink Unit 10 Healthy eating Exercise 1
B: So we had {#blank#}2{#/blank#} teach them how to save water.
—Yes, they are.
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