题目

Mark and Sophie are good friends. They both like animals.It is Sunday today. It's warm and ______, so they decide to take a walk to the city zoo.When they reach, they first go to the ______ cage. They want to see a new lion. She is there ______ only three weeks. She is very beautiful. She has big brown eyes. When the lion ________Mark and Sophie, she opens her big mouth and shows her ______ to them.Sophie asks Mark to go to the monkeys' area. She buys bananas and feeds them slowly. They are very funny. They______ up and down a lot.Then they go to the snakes'（蛇的）area. Sophie feels afrai细菌的繁殖速度很快，在适宜的环境下，分裂一次只需 [　　] A．几分钟B．2～3小时 C．20～30分钟D．2～3天