A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to_________in Hong Kong, these trees were cut down and burnt. Now there is_________forest left, though there are still some small areas covered with trees. We call these woods.

Elephants, tigers and many_________animals were living in the thick forest. When people came to live in Hong Kong, the_________began to die out. Early farmers grew rice and_________pigs and chickens in the valleys. They cut down the trees and burnt them. They needed_________to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared_________there was not enough food for them. So did most of the wolves and tigers. Monkeys and many other animals soon_________in the same way.

You might think that there are no longer any animals in Hong Kong_________in the zoos. But there are still about 36 different animals____________there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals____________a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet ____________.They make a noise rather like a dog____________. In Hong Kong the barking deer has only a real enemy--____________.People hunt these little animals though it is illegal(违法的). There are now not many barking deer left. So it is important____________people to protect wild animals.

【推荐2】Have you ever tried to teach a bird how to talk? I bought a parrot and _____ to teach it right away. I named it Danny Clark. I _____ the bird and said ＂Danny＂over and over again, Fifty repetitions a day for two months! Then it _____ happened.

One morning as I was leaving the room, the parrot blurted out (脱口而出)＂Danny. ＂ Now it was time to teach it its last _____, Clark. I followed the same _____ and found that its learning was speeding up!

Then something very _____ happened. I got sick and spent two days in the house coughing. That weekend, I had a party. I showed the talking bird to _____ friends, I got the satisfying result and it said ＂Danny Clark＂. And then it coughed. Yes, the bird.

Did I teach the bird to cough? No! The bird’s behavior was a product of its _____ and so are humans. What goes into our minds _____ and will finally come out. How did we learn to talk, walk, sing and dance? We are not born — we are made. ______ the right input (输入）, we can actually become the ＂bird＂ we dream of being!

The first astronauts

Since the earliest times, people have looked up at the stars, the moon and the planets. Today people use modern machines ________ at the sky. This is very different from the situation ________ years ago when people could only use their eyes. Perhaps they dreamed of exploring (探索) the ________.

When did humans first go into space? The story began not so very long ago, ________ the first astronauts were not people—they were animals.

Scientists wanted to make travelling to space as ________ as possible for humans. So they decided to experiment with animals and test ________ in spaceflights. Insects, mice, frogs, dogs and monkeys were some of the animals that first ________ into space. Many of them ________, but they helped to make space travel safer for humans. For their great service, we ________ forget these animals.

Albert Ⅱ was the first monkey to go into space in 1949. Sadly, he died ________ his spaceship landed back on Earth.

________ the result was different for Ham, the Monkey. His story ended happily when he returned to earth ________ very good health.

Scientists wanted to know the answer to the important question: could ________ animal like Ham do the same things in space as he could do on Earth? The ________ came when Ham was sent into space in 1961. Yes, he did everything well and lived for ________ 16 years.