翻译句子。
1.他把枪对准那扇门.(aim…at)
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2. 她要尝试打破世界纪录.(attempt)
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3.他试图组织一次户外活动.(make an attempt)
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4.你无法预言这些家伙要干什么.(predict)
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5.我们做过这道题好多次了.(a great many)
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