When you think of a fearsome hunter, images of lions and sharks may spring to mind. Recent research by     1     scientists, however, shows that in fact, humans are the most fearsome hunters who have the greatest impact on animal populations. Human activities have brought many animals close to     2    . In the last 500 years, over 300 species of animals have gone extinct. Some activities, such as hunting and fishing, directly harm animals,     3     other activities, such as development in towns and cities, impact indirectly on animal populations.

Hunting and fishing have directly influenced the world’s animal populations. Some people hunt animals for food: whale meat is     4     in some parts of the world. Some people hunt animals for fashion: animal skin is used to make coats and bags. Still others hunt animals just for fun: deer are     5     and shot by people who enjoy the     6     of the sport.

Human activities that have indirect effects on animals can be just as     7    . When we build farms or factories, we destroy animal habitats and leave many animals with    8     to live, or no food to eat. We can also put animals in danger without ever entering their habitats. Air, water, noise and light pollution can all have a deep and     9     influence quite far from their source. Partly due to pollution caused by ship traffic and other human activities, the dolphin population has     10     greatly. As the human population continues to grow, so does the effect we have on animals.

The carpet rose again and almost at once they were in a thick rainforest. A monkey watched them as it    1    .   “What are you doing?” asked Daisy. “I    2    myself from mosquitoes,” it replied. When I find a millipede insect, I rub it over my body. It contains a powerful drug which     3     mosquitoes. You should pay more attention to the rainforest and     4    how the animals live together. No rainforest, no animals, no drugs.”

Daisy had always longed to help    1     species of wildlife. One   day she woke   up and   found a flying carpet by her bed.

Hunting and fishing have had damaging effects on the world’s animal populations. Some people hunt animals for f    1    : whale meat is eaten in some parts of the world. Some people hunt animals for f    2    : animal skin is used to make coats and bags. Still others hunt animals just for fun: deer are tracked and shot by people who enjoy the e    3    of the sport.

Human activities that have indirect effects on animals can be just as h    4    . When we build farms or factories, we destroy animal habitats and leave many animals with n    5    to live, or no food to eat. We can also put animals in danger without ever entering their h    6    . Air, water, noise and light pollution can all have a deep and damaging i    7    quite far from their source. Partly due to pollution c    8    by ship traffic and other human activities, for example, the dolphin population has d    9    greatly. As the human population continues to grow, so does the e    10    we have on animals.

In the past hundred years, there have been violent natural disasters occurring worldwide, such as     1    （洪水）,     2    （干旱），mudslides and     3    （地震）. The disasters have caused millions upon millions of people deaths,     4    （毁坏）countless homes, and wiped out numerous pieces of fertile land.

Now more and more people become aware that what we have done have done damage to the earth. So it is     5    （紧急的）for us to stop damaging it, and to do our best to     6    （保护）it, for we have nowhere to go and survive except where we are now.