说话应该用talk，To imitate the sounds of human speech:
模仿人说话的声音：例句：
The parrot talks.
这个鹦鹉会说话
所以应该是The rabbit can't talk.
第二句不太确定，不过write是不对的，
Many children's songs describe it.
describe的意思及例句如下：
To give an account of in speech or writing.
描述：口头或书面描述
To convey an idea or impression of; characterize:
描述，刻画：表达想法或感受；刻画：
She described her childhood as a time of wonder and discovery.
她将她的少年时代描绘成一个充满幻想和发现的时期
To represent pictorially; depict:
描绘：用画描述；用画表示：
Goya's etchings describe the horrors of war in grotesque detail.
戈雅的版画用诡异的风格描绘了战争的恐怖
To trace the form or outline of:
沿着…画：
describe a circle with a compass.
用圆规画一个圆
