Mrs. Black is a fifty-year-old lady. She lives in a beautiful house in a small town. She has two cats. One is very big and the other is very small.

She likes them very much. One day, her friend Mrs. White came to see her. When she found two holes in the door, one large and one small, she was surprised and asked, "My dear friend, why are there two holes in your door?" "Of course it's convenient for my two cats to get in and out," Mrs. Black replied.

"But why are there two holes? Isn't an inner hole enough? " She asked. "How can a big cat get through a small hole?" Mrs Rong said.

Extended data

College English learning should be targeted and focus on the application of knowledge. We can start from the following four aspects:

(1) Read more after class, accumulate vocabulary and learn to analyze and understand long and difficult sentences;

(2) Do more listening training and pay attention to the combination of extensive listening and intensive listening;

(3) Pay attention to practicing oral English conversation in different situations;

(4) Do more written training and master different styles of writing.