根据首字母，写出正确的单词

46.E_____________ are the biggest animals on land.

47.W____________ to the zoo.

48. A g _______ has a very long neck(脖子). It's a beautiful animal.

49. A dolphin is very c________ because it can act (表演)as people do.

50. The panda is very shy, so please be very q_______.

Even in early time, people could realize the important of dreams and knew that dreams gave meaning to life. Every great achievement has been the result of years of dreaming. If a person has a dream and holds fast to it, he or she will find a way to bring it into reality (现实).
Children do not have much experience or knowledge. However, they are natural dreamers. We should not laugh at them for being naïve. Many great men were dreamers when they were children. One such dreamer was Thomas Edison. He used to be ostracized (排斥) when he was in primary school, but his achievements were greater than everyone else’s in his time.
Teenagers and young people should also be encouraged to dream. The world is full of successful teenagers and young people. They dreamt big and their dreams changed their lives and even the world. Steve Jobs and Bill Gates are the good examples. They have developed technology and brought great progress to human besides making money for themselves.
Older people should believe that it is never too late to dream and that human mind is never too old to make dreams turn into reality. Colonel Saunders realized his dreams at the age of 67 and set up the biggest fried chicken company (KFC) in the world.
To dream is a wonderful ability which can lead to wonderful results. Olympic records were broken by players who were brave enough to dream. No one is too young or too old to dream and to make dreams come true.
【小题1】 People who ______ could probably realize their dreams.

Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.

Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.

Whenever the scientist woke people during REM sleep, they were having vivid dreams. Measurements showed that sleepers’ pulses（脉搏）went up quickly during REM sleep. Their breathing, heartbeat, and the blood going to the brain also increased. Far from being a time of rest, REM sleep is a time when the body is hard at work. Scientists still don’t know the reason for this. Some believe REM sleep makes learning easier. Babies spend a lot of time in REM sleep. Because of this, some scientists believe that REM sleep helps the brain grow. Others think REM sleep is a time for the brain to empty the day’s garbage.

One thing all the scientists agree on is that sleep is necessary. Without enough sleep, people make mistakes. Most major car accidents happen during the early morning hours, when people are sleepiest.

1.During REM sleep, a person’s breathing and heartbeat ________.

A．stop   B．increase     C．decrease   D．stay the same

2.Which word in paragraph（段落）3 means “colorful and lively”?

A．easier         B．empty         C．vivid   D．quickly

3.Which paragraph tells what happens when people don’t get enough sleep?

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

4.What is the main idea of the article?

A．REM sleep helps the brain grow.

B．REM sleep has been watched and recorded by scientists.

C．REM sleep is a time to empty the day’s garbage.

D．REM sleep is an active time when the body is hard at work.

5.You can decide from the article that REM sleep ________.

A．has a restful effect on people

B．can be avoided with lots of sleep

C．is something that all people experience

D．is something that all scientists agree on