Contrary to what many people might     1    ,evidence shows that sharks seldom attack humans.There are three types of shark attacks.In the main type,the shark attacks you because it     2    you for a fish,but when it tastes human flesh it decides to give up and swims away.In the second type,the shark pushes you with its nose to find out if you are     3     to be eaten,and then     4    you if it thinks you are.In the third type,the shark waits for you to swim by,and then attacks you suddenly.The last two types of attack more often       5    in the death of humans.

Many developed nations are now concerned about saving nature rather than developing or destroying it. However , many poorer nations must focus on     1    the everyday needs of their people. In doing so , they are using up natural resources at a fast pace . They have not yet seen the effects of the     2    use of the environment like many wealthy nations have. Often they do not realize that the choices they make are bad for the environment . Should they be     3    for destroying hundreds of thousands of acres of rainforest if it means a better income for their people? The developed and developing countries need to work     4    make sure that people enjoy healthy and happy lives without the environment around them     5    .