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A tornado was approaching and we had to go into emergency tornado procedures. I was helping to gather items for a project 1. ____ it happened. When the sirens (
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A tornado was approaching and we had to go into emergency tornado procedures. I was helping to gather items for a project 1. ____ it happened. When the sirens (警报器) occurred I 2.____(imme-diately/gradually) ran as fast as I could back to the classroom.
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