Mr. Smith has two cats. One is big and the other is small. He likes them very much. One da

Mr. Smith has two cats. One is big and the other is small. He likes them very much. One day his good friend Mr. White es to see him. He is very surprised(惊奇的).He finds there are two holes(洞) in the door, a big hole and a small hole. He says, “My dear friend, why are there two holes in your door?” “To let them in and out.” Mr. Black answers. “But why are there two holes?” his friend asks, “How can the big cat go through the small hole?”
【小题1】Mr. Smith has     .A．two small catsB．two big catsC．a big cat and a small oneD．a cat and a bird【小题2】Mr. White es to see    . A．Mr. SmithB．Mrs. Black C．the catsD．the holes【小题3】According to this passage.      is not necessary(必要的).A．The big holeB．The small holeC．The big door.D．The small door.C