在特定的培养基上，培育出了纯种的酵母菌，这些酵母菌构成了一个      （　　）

①在大亚湾核电站已安全运行多年的基础上，广东将继续发展核电，以减少火力发电带来的二氧化硫和二氧化碳排放问题

②积极推行“限塑令”，加快研发利用二氧化碳合成的聚碳酸酯类可降解塑料

③加速建设地铁、轻轨等轨道交通，促进珠三角城市一体化发展，减少汽车尾气排放

④发展低碳经济、循环经济，推广可利用太阳能、风能的城市照明系统

⑤使用生物酶降解生活废水中的有机物，使用填埋法处理未经分类的生活垃圾．

读短文，将方框里的五个句子还原到短文中。

C

    I'm Mark. I live on a farm. There are some elephants on my farm. They can play soccer and ____. They are very smart. I use them to carry things, sometimes, ____.

    I'm Sue and I'm from India(印度). The Indian people look up to cattle. ____. When you come to India, you can see cattle walking along the streets, and eating fruits and vegetables in the shops.

    Hi, I'm Judy. I live in Australia. My family has three shepherd dogs(牧羊犬).  These dogs are not big but ____. They can run very fast.

    I'm Leo and I have a parrot. Her name is Susan. She is beautiful and interesting. And she can speak, too. When my friends come to my home ____. Susan likes eating carrots. And she likes singing when she feels happy.