1.We are hungry. We need to buy something to eat.2.She is too busy today. She has a lot of work to do.3.Quiet please! I have something important to tell you all.4.Would you please tell him to turn down the television?5.Nobody knows what to do next.6.I am going to the post office to buy some new stamps this afternoon.1.Tiger is the national protected animal. Its number is decreasing day by day. There are only about 400 now.2.The reason is that some people catch and kill them excessively in order to make money. The over felling of the forest destroys the tiger's living environment.3.The country should take some measures, make laws, protect the tigers and punish the predators.4.I hope everyone would all try hard to create a happy homestead for man and animals together.