阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中选出可以填入空白处的最佳选项。

　　The study of science helps us to better understand the natural world.Scientists are learning to predict__16__things as earthquakes.This is something that__17__to save hundreds of lives.__18__are also continuing to study many__19__natural events such as storms of various kinds.Scientists are also studying people.__20__are trying to understand not only__21__makes people human，but also the things__22__affect people such as illness.They are__23__various other things of human biology，__24__.The study of the natural world by scientists and by students of science may help to__25__the world easier to understand.It __26__also save many lives，and improve__27__for many people all over the world.

　　Some of the things they might study__28__a science course are very interesting questions__29__people and their lives.Some of __30__questions are：What are men and__31__？What information would help us to understand all people__32__？What information can explain where human beings come from and why they act the way they do？Questions__33__these have led biologists to understand the origin(发源地)__34__development of the human race.Some of the other questions biologists study have something to do__35__illness.What makes people sick？These are all questions that interest scientists and that，when answered，will surely，have an effect on our lives.

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