阅读短文选择填空。
An old woman       a cat. The cat is very old. It can’t run fast and it        catch mice. When the old cat sees a mouse, it tries to        the mouse. But the mouse       . The woman is very angry about it. Then she has a good idea. She buys a new cat to catch mice. Now the       one can rest.
（1）A. have               B. has                C. had
（2）A. can                B. could              C. can’t
（3）A. catch               B. caught             C. catches
（4）A. runs away           B. flies away          C. walks
（5）A. old                B. new                C. little