下列哪项不属于生物防治（　　）

具有物质交换功能的血管是（    ）

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.