题目内容
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏词符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)画掉。
修改：在错的词下画一横线，并在该词下面写出修改后的词。
注意：1.每处错误及修改均仅限一词；
2．只允许修改10处，多者(从第11处起)不计分。
When Mr and Mrs Smith went to theatre，they left their German dog to guard his home.When two burglars broke into and the burglar alarm rang，the dog was waiting for them.Unfortunately，one of the burglars was dog－lover，and he quickly made friends with it.While the alarm was ringing，but the burglars were stealing cash and jewelry，worth over $10，000 from a safe，the dog laid down in his basket and went to sleep.When the police arrived at twenty minutes later，the burglars had gone.The dog was proudly guarded the empty safe.When the first policeman entered into the room，it immediately attacked him，tearing his trousers and bit him in the leg.
ect your life in the present.If you cannot forgive the past,then your future will be dark.
)，并在其下面写出该加的词。