1 . So far, only three countries ______________ (manage) to independently send humans into space: China, Russia and the U.S. (用所给词的适当形式填空)
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3卷引用：上外版必修第一册Unit1 School Life
2 . Tim m________ the company when his father was away. (根据首字母单词拼写)
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3卷引用：外研版2019必修二Unit 5 presenting ideas课前预习
外研版2019必修二Unit 5 presenting ideas课前预习（已下线）外研版2019 必修二 Unit 5 第三课时 基础练（Developing ideas & Presenting ideas）外研版2019 必修二 Unit 5 Developing ideas & Presenting ideas
