Today many trees in forests are cut down. A lot of land has become desert (沙漠). If you read  {#blank#}1{#/blank#} you'll learn that the forests on the .earth are getting smaller all the time. Some scientists {#blank#}2{#/blank#} that there will not be any great forests in 20 or 30 years.

    What will {#blank#}3{#/blank#}  if all forests disappear? A 10t of plants will die and animals will {#blank#}4{#/blank#} their home. Farmland will soon {#blank#}5{#/blank#} into desert. There won't enough rain and the weather will be  {#blank#}6{#/blank#} and dry. The life will be {#blank#}7{#/blank#} for everyone. Our living {#blank#}8{#/blank#} will become worse and worse. It is our duty to {#blank#}9{#/blank#} the forests. Everyone should try {#blank#}10{#/blank#} best to take care of forests. Stop cutting down trees and make the world greener!

    It was Sunday. The weather was very fine. The students of Class One {#blank#}1{#/blank#} for a picnic. They went by bus with fruit, vegetables, meat, cookers and some other things.

    At about half past ten, they {#blank#}2{#/blank#} at the foot of a hill. There was a big lake and many green trees. Birds were singing and the air was very clean. The students began to {#blank#}3{#/blank#} for the lunch. Some of the students were getting water from the lake. Some were washing vegetables and fruit. At about twelve o'clock the lunch was ready.

    The food was {#blank#}4{#/blank#}. After lunch, they had a great time singing, dancing, drinking and talking. At three o'clock they began to climb the hill. The hill was very tall, but they all tried to climb to the top(顶部) of it. On the top of the hill, they felt very excited.