professor taiju matsuzawa wanted to find out why otherwise healthy farmers in northern japan _____ to be _____ their ability to think and reason at a ______early age, and how the process of aging could be ______ down.
taiju matsuzawa 教授想找出为什么日本北部的健康农民在相对年轻的年龄就显得开始失去思考与推理的能力的原因以及怎样才能延缓老化过程。
参考答案：appeared,losing,relatively,slowed
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however, you do not have to wear a seat belt if you are _____ your vehicle; or you are making a local delivery or ____ using a special vehicle; or if you have a ____medical ____ which excuses you from wearing it.
[参考译文]当然，如果有以下情况你可以不系安全带：你在倒车时，或者你用一种特殊交通工具进行当地的货物运送、收集时，或者你有合法的医学证明你不能系安全带时。
参考答案：reversing,collection,valid,certificate