题目

阅读理解     It's difficult to know the exact answer to whether babies dream and what they dream about. However, sleep experts have shown that newborns dream the most in the first two weeks after birth. Babies spend most of their sleeping time in REM(rapid eye movement) stage. As dreaming takes place in a light state of sleep, newborns tend to wake up due to noises, movements and other factors. When dreaming, newborns make a few noises and their eyes move. They may move around the sides or up and down. They may laugh, scream, or cry during the REM sleep. Also, their facial muscles, hands, and legs move, due to which they may wake up. So wrapping a baby in swaddling(裹紧的) clothes can keep the baby's body from moving and help them sleep better. As babies grow, their body movement decreases when dreaming.     Studies say that the brain activity associated with dreaming is essential for the babies' mental development. During the REM stage, the flow of blood to the brain increases. As a result, certain nerve proteins are produced, which are the building units of the brain. Babies get stimulation from what they see, hear, or feel. The brain processes the information acquired while awake, and stores what is essential to the individual. A study concludes that babies learned while they were dreaming.     What's the time for babies to start dreaming? Researchers say that before birth, babies start experiencing REM sleep around week 25, and so they may start dreaming at the point. On the contrary, some psychologists believe that children start having dreams when they are about 5 years old. At that age, they start becoming aware of themselves and begin to understand the things around them, which is what dreams are actually made of. （1） What may babies do in the REM stage? A . make faces B . stay awake C . burst into laughter D . make eye contact with others （2） What's the second paragraph mainly about? A . benefits of baby-dreaming B . reasons for baby-dreaming C . when babies start dreaming D . how babies dream while sleeping （3） Which word has the closest meaning to the underlined word "stimulation"? A . messages B . possibilities C . conclusions D . descriptions 答案： C A A

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