Mr Black has two cats. One is big and the other is small. He likes them very much. One day his friend, Mr Green, comes to see him. He is very surprised (惊讶). He finds there are two holes (洞) in the door, a big hole and a small one. 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?” asks his friend. “How can the big cat go through (穿过) the small hole?” he says.
1．Mr Black has two big cats.
_______2．Mr Green comes to see the cats.
_______3．There are two holes in the door.
_______4．The two holes are big.
_______5．Mr Black is very clever.
_______
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