水的硬度按其所含可溶性盐类的组成分为两类：暂时硬度和永久硬度，下列各项中，不属于暂时

请阅读下面短文，掌握其意思，然后从方框中所给方的词中选出最恰当的10个，用适当形式填空。（每小题1分，共10分）

healthy, what, because, ourselves, speech, teach, to, find, isn’t, scientist, that, so

In America, science is a very important class. In middle school we were __小题1:_ how to solve problems by thinking like a ___小题2:__. We had to think of a question, guess an answer, and ___小题3:__ a way to test our guess. There were lots of experiments and other activities. I remember studying how science can explain things like light and electricity.
Our English class is very different from___小题4:__ in China, more like Chinese class I think! We read lots of books and talked about them, ___小题5:_ we could understand what we read better. We learned how to know what information is important when we read and what ___小题6:_ so important. In my class we all gave six ___小题7:_ to the class during the year. We had to talk in front of the class for six __小题8:ten minutes!
We also have health classes. In this class, we learned about our bodies and how to take care of ___小题9:__ by doing things like eating healthy foods, and not doing ___小题10:__ things like smoking or drugs (毒品). We cooked a little bit, but I was not very good at it!