根据短文内容，从下面方框中选择适当的词或词组填空。

are interested in ,  work out ,    a lot of ,  as well ,    improve

Chinese kung fu has already taken the central stage in the sports world.foreign pioneers are starting to learn it. They【小题2】it because kung fu can nurse a person’s body and mind. By practicing it, people can find the peace from the heart and they can face the world more bravely【小题3】. There are lessons for kids between 5 and 16 in more and more foreign Chinese kung fu schools. Kung fu can【小题4】children’s self-confidence. At the same time, they can learn to【小题5】difficult situations with bad strangers.