1.只有当他说出那个字后，他才意识到自己犯了个大错误。
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2.学校到底什么时候开运动会呢?
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3.直到信的末尾，她才提到她自己的计划。
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4.在当地导游的帮助下，登山者才获救。
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5.你可一定要跟我说实话，否则我帮不了你。
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答案 1.Only after he had spoken out the word did he realize he had made a big mistake.
2.When is it that our school will hold the sports meeting?
3.It was not until near the end of the letter that she mentioned her own plan.
4.It was with the help of the local guide that the mountain climber was rescued.
5.Do tell me the truth，or I can't help you.
