下列属于生产者与消费者之间关系的是（ ）
A．蛇吃青蛙
B．猫头鹰吃鼠
C．兔吃草
D．虎吃羊
在生态系统中，生产者是指能进行光合作用，利用自己制造的有机物来维持生活，并为其他生物提供物质和能量．生产者一般指绿色植物．消费者包括各种动物，它们直接或间接以植物为食物．所以，在一个生态系统中，生产者与消费者之间存在着被吃与吃的关系．题目中，A．蛇吃青蛙、B．猫头鹰吃鼠、D．虎吃羊都是消费者与消费者之间的关系，不符合题意．
故选：C
I'm thinking about what I'm going to do this summer. Maybe I'll get a job. If I get a job, I'll have ____money to buy some new things. I'd like to have some new dresses ____ I start school again in September. I can also buy some books or some music CDs. I really love jazz(爵士乐)．I could buy some more CDs____my jazz collection. Or I can use the money ____tennis lessons. I can play tennis ____，but I'd like to learn to play it much better. Or maybe I can use the money to pay for the piano lessons.I'd like to learn to play the piano，too. If I don't get a job this summer, I'll visit my grandparents in San Francisco. They live in a beautiful old house ____ the sea. My grandparents are always very nice to me. They'll let me sleep late. I ____ have to get up until 10 o'clock every day. I'll eat delicious food because my grandmother is an excellent ____. She always cooks my favorite food. I'll also go to the ____ with my grandparents. Because I like swimming in the sea. My grandparents like to go to museums but I don't enjoy it so much, so maybe I'll ____to watch TV.
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