第一节　短文改错(共10小题；每小题l分，满分10分)
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l0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：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2．只允许修改l0处，多者(从第11处起)不计分。
In early January this year，the rate of UFO reports were steady，around three per weeks.When，however，on Monday，January 16，a science fiction film about visitors to outer space was shown on television，there was the immediate increase in reports of sightings from all parts of the States.The commanding officer, Wayne Tyler，who directly responsible for the study of all such reports，decided to making his findings known.They wrote an article，which said that all UFO reports could be explained for quite naturally by aircraft movements.Follow this explanation，there was a rapid drop in the number of reported sightings，because the rate remained above the previous level.