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Put the verbs into the correct past form.
4 ​Harry ……………….……….. (do) a first aid course before, so he ……………….……….. (know) what to do.
​5​ Shelley …………………….. (just/get) out of her tent when she ……………….……….. (see) a venomous spider.
​6​ Sarah ……………….……….. (wander) for hours before the rescue crew ……………….……….. (spot) her.