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
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Chinese kung fu has already taken the central stage in the sports world.____ foreign pioneers are starting to learn it. They____ 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____ . There are lessons for kids between 5 and 16 in more and more foreign Chinese kung fu schools. Kung fu can____ children's self-confidence. At the same time, they can learn to____ difficult situations with bad strangers.
