Mr. Black has two cats(猫). One is big(大的) and the other is small（小的）. He likes them very much. One day his friend Mr. Green comes to see him. He is surprised(惊奇). He find there are two holes(洞) in the door, a big and a small one. He says, “My dear friend, why are there two holes in your door?” “To let them in or out,” Mr. Black answers. “But why are there two holes?” asks his friend. “ How can the big cat go through（通过）the small hole?” he says.
小题1:Mr. Black has ____________.
A. two small cats
B. two big cats
C. a big and a small cats
小题2:Mr. Green comes to see___________.
A. Mr. Black B. the cats C. the holes
小题3:Mr. Black wants _____________ to go through the two holes.
A. the big cat B. the small cat C. the two cats
小题4:Mr. Black thinks the big hole is only for the____________.
A. the big cat B. the small cat C. Mr. Green
小题5:____________ is not necessary（必要的）.
A. The big hole B. The small hole C. The door
