阅读下列资料，分析回答问题：

资料1：一只失去雏鸟的美国红雀，总是给养鱼池边浮到水面张口求食的金鱼喂它捕来的昆虫，就像喂自己的雏鸟一样，一连喂了好几个星期．后来，美国红雀一飞到岸边，接着有很多金鱼会游过来张口等待．

资料2：猫捉老鼠是天经地义的事，然而有时却发现正在哺育后代的母猫也能接受并喂养刚出生的小老鼠，并不伤害它们．

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。

    I have some great friends at summer camp. They can all do different ____ (thing). This is Helen. She's good at ____ (musical). She can sing, and she can play ____ piano. Oh, she's a ____ (greatly) dancer, too. But she can't cook. And she can't play the guitar. Tom is ____ (real) cool. He is from America. He can speak Chinese well, and he can ride a motorbike. He can't play the piano ____ the guitar, but he can sing·

    Then this is ____ (I) sister Alice. She can run really fast, and she can ____ (player) basketball and soccer. She can ride a bike. But she can't ride a motorbike.

    Charles ____ (do) well in sports. He can swim, and play tennis and basketball. He can run fast, too. ____ he can't cook. Julie can speak Chinese, and she can cook, too.