Long long ago, people lived in a clean world. There were no modern {#blank#}1{#/blank#} (machine). The air was fresh. However, life today has {#blank#}2{#/blank#} (bring) many new problems. One of the {#blank#}3{#/blank#} (big) is the environmental pollution. Noise pollution makes us hear more loudly and get {#blank#}4{#/blank#} ['æŋɡri] more easily. Light pollution is {#blank#}5{#/blank#} (harm) to birds. Air pollution is the most serious {#blank#}6{#/blank#} ( [kaɪnd]) of pollution. It is bad for all living things.

      Now, in order to protect our world, we need to do some important things. For {#blank#}7{#/blank#}, we should use both sides of paper and reuse plastic bags. Everyone should care for {#blank#}8{#/blank#} [waɪld] animals and plant more trees. Of course, easier said than done. {#blank#}9{#/blank#} (action) speak louder than words. If everyone knows the {#blank#}10{#/blank#} (important) of protecting the environment, the world will become more beautiful.