It's necessary to discover what you are good at or not and what you like or dislike.
    Many students would be unhappy if they f____  in a very difficult physics course, but in fact they have known a lot about t____  They realize that they should not become engineers or p____ scientists in the future. So falling can help a student to live a happier life if he or she draws something out of it. They may then decide on their aim and c____  the kind of work that they would be fit for and they would like to do.
    You can't be sure whether you like something u____  you have tried it. If you make a d____  that you would like to play the violin, you need to take more music classes b____ you know if you are really interested in it.
    It is not e____  to hope to be a violinist. You also have to stand the hard practice before you become one. If you would enjoy being a great violinist, but hate the hard and b____  work, just give it up.
    It's a good plan to try as many ideas as possible when you are still young. And then you will be able to find o____ what your true interests are.

阅读材料回答问题

小华爸爸早逝，他与妈妈一起生活。妈妈整天忙于工作，无暇顾及他，就给他请了一个保姆，并且给了他很多零花钱。小华认为妈妈不爱他，因为只有在他生病或者惹祸时才能够看见妈妈。于是，小华经常惹是生非，学习成绩也直线下降。

要建立一个幸福和谐的家，小华和妈妈应该怎么做？请你给他们建议。