1. 根据材料内容，从方框中选择恰当的单词填空，使材料意思完整、通顺，有的需要变换形式，其中有两个词是多余的。

As, sound, they, clever, send, imagine, heavy, hear, lucky, know, if follow

    Mr and Mrs Brown were farmers in South Australia．They lived there for many years．They had a kangaroo(袋鼠)infamily．The kangaroo was called Lulu．Several years ago，Mr Brown's son gave Lulu to hima gift for his 60th birthday．Soon Mr Brown and Lulu became good friends and Lulu Oftenhim around the farm．

    One day when Mr Brown was working on his farm，a(n)tree branch(树枝)fell on top of him suddenly．Mr Brown fell to the ground and didn't what happened next．Lulu stood next to Mr Brown's body．She started barking (叫)and didn't leave Mr Brown．"She like a dog．She barked and barked．And she didn't stop．"said Mrs Brown．After  Lulu's barks．Mrs Brown quickly went to see what had happened．She saw Mr Brown lying on the ground and him to the hospital right away.，Mr Brown was saved(挽救)．

    "Lulu is great!"said Mr Brown．"She saved me!She is a friendly and very kangaroo．"After Mr Brown left the hospital，he took Lulu everywhere he went．