18．A.losing B．changing C．keeping D．exploring

　　19．A.roots B．branches C．leaves D．hands

　　20．A.punished B．troubled C．protected D．damaged

　　Ⅴ.语法填空

　　1．___ July 28,1976，eleven kilometres directly below the city of Tangshan，the 2._______(great) earthquake of 3.the 20th century began. In fifteen terrible seconds，a large city 4.___ (lie) in ruins. Two­thirds of the people died or 5.___________(injure)．Thousands of families were killed and many children were left 6._________ parents. Everywhere the 7._________ (survive) found nearly everything was destroyed. People began to wonder how long the disaster 8.__________ (last)．All hope was not lost. Many soldiers 9.__________(send) there to help the rescue workers.10.__________(slow)，the city began to breathe again.

　　Ⅵ.短文改错

　　As a tour guide，I'm glad to tell you that more and more tourists are paying attentions to environment protection. Several years before，in one place of interest I saw rubbish throwing away everywhere，such as waste paper，plastic bags. However，some tourists climbed trees or picked up flowers. Some even scared or catch little animals. What's more，some of them made a fire to cook，which might cause a forest fire. Recently great changes had taken place. Most tourists take rubbish away with them while they leave. They no longer hurt little animals. Trees and flowers are well taken care. In the forest，smokers give up smoking so as not to start a fire. Now I sing high praise for so good deeds.

　　答案：

As a tour guide，I'm glad to tell you that more and more tourists are paying to environment protection.Several years ，in one place of interest