Read and answer. (读短文，回答问题。)
Mr Green has a cat and a dog. The cat is big and the dog is small. He likes them very much. Last Sunday, Mr Black come to see him. He saw two holes (洞) in the door, a big one and a small one. He asked, “Mr Green, why are there two holes in the door?” “Let the dog go through the small hole, and the cat go through the big one,” Mr Green answered. “But, can they go through just one hole?” asked Mr Black. “How can the big cat go through the small hole?” said Mr Green.
（1）Is Mr Green’s cat small?
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（2）When did Mr Black come to see Mr Green?
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（3）What did Mr Black see in the door?
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（4）Why were there two holes in the door?
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（5）Do you agree (同意) with Mr Green?
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