Can dogs dream? If they can, what do they dream about then?
Dr Deirdre Barrtt, a psychologist, believes that she has found the secret of what dogs dream about. She thinks dogs dream about their owners. She said, "Humans dream about the same things they're interested in by day. There's no reason to think animals are any different. Dogs usually like their human owners, so it's possible that your dog is dreaming of your face, your smell and of having fun with you." She even advised pet owners to give their pets "happy daytime experiences" to make sure they have nice dreams.
Dr Barrtt said that there is no way of knowing for sure what dogs see when they dream. Research hasn't even discovered that mystery with human dreams. Her ideas are based on(基于)the fact that dogs and some other mammals(哺乳动物)have a sleep
cycle that is similar to the human cycles. She said, "That certainly makes it the best guess that other mammals are dreaming too." Dr Barrtt also explained why dogs move their legs as if they're "running" in their sleep. "They are probably acting out their dreams," she said.
() 1. According to Dr Barrtt, why can dogs dream about their owners?
A. They like their human owners.
B. They are afraid of their owners.
C. They are special mammals.
D. They have a different sleep cycle.
() 2. What can we infer from the passage?
A. We have already known for sure what dogs see when they dream.
B. We have already discovered what humans see when they dream.
C. Happy daytime experiences may help dogs have nice dreams.
D. All mammals have a sleep cycle and can dream.
() 3. What can be the best title for the passage?
A. Dogs like dreaming B. Dogs are dreaming
C. Mammals' sleep cycles D. Dogs' sleep cycles
() 4. This passage might be found in a.
A. dictionary B. travel guide C. magazine D. storybook

1. A 2. C 3. B 4. C