Directions : For this part , you are allowed 30 minutes to write a composition on the topic: Sounds in three paragraphs You have been given the first sentence of each paragraph .You should write at least 100 words .

　　Sounds

　　1) The world is filled with many sounds _____________

　　2) Some sounds are useful __________

　　3) But some sounds are harmful _________

　　Sounds

　　The world is filled with many sounds . Everyday we are surrounded by all kinds , such as music and noise .

　　Some sounds are useful . Among these useful sound , music is very important . Music brings a lot of pleasure to us and makes our lives colorful . Of course , there are also other useful sounds . Such as whistles of police car which inform us to give way to emergency .

　　But some sounds as harmful . For example , the noise made by the loudspeaker of a car can disturb our peaceful lives . Therefore , in some cities , cars are forbidden to blow whistles .

　　In the end , we hope the world can be filled with more useful sounds and less harmful sounds .