A woman (女人) has a cat. The cat is old. It can't run fast (快) and it can't catch mouse (捉老鼠). One day, the old cat sees a mouse, it wants to catch it, but the mouse runs away. The woman is angry with (生气) the old cat. Her husband(丈夫) has a good idea(主意) to buy( 买)a new cat. Now the old can rest(休息).
根据短文内容，选择正确答案。
