Hunting and fishing have directly     1     the world’s animal populations. Some people hunt animals for food: whale meat is eaten in some parts of the world. Some people hunt animals for fashion: animal skin is used to make costs and bags. Still others hunt animals just for fun: deer are     2     and shot by people who enjoy the     3     of the sport.

Human activities that have     4     effects on animals can be just as harmful. When we build farms or factories, we destroy animal     5     and leave many animals with     6     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     7     influence quite far from their source.     8     due to pollution     9     by ship traffic and other human activities, the dolphin population has dropped greatly. As the human population continues to grow,     10     does the effect we have on animals.

In order to save this species from     1    , the Chinese government placed it under national protection. Zhaxi and other     2     watched over the antelopes day and night to keep them safe from     3    . Bridges and gates were     4     to let the antelopes move easily and keep them safe from cars and trains. The measures were     5    .

We can also     1     animals in danger without ever entering their habitats.Air ,water,noise and light pollution can all have a deep and damaging     2    .Partly due to pollution     3     by ship traffic and other human activities,the dolphin population has     4     greatly .As the human population continues to grow,     5     does the effect we have on animals

The Earth is made up of three layers. In the centre is the core, which is as big as the Mars and has a high     1     of over 7,000˚C.     2     the core is a thick layer called the mantle,     3     lower part is solid rock,     4     portion is molten rock called the magma. Floating on top of the magma is the Earth’s rocky crust.

The crust is made up of tectonic plates. These huge plates are moved slowly by magma currents below, sliding past each other with     5    . If a plate is forced down     6     another and gets     7    , pressure will build up until the stressed rocks suddenly     8     apart, causing     9     ground movements called earthquakes. The point where the rocks suddenly jolt or break is called the epicentre, from which, powerful shock waves     10     out in all directions.