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处错误，每句中最多有两处。错误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(Λ)，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10处，多者(从第11处起)不计分。

    Last month, I had a unpleasant holiday. Having visited the Australian mainland before, I planned to going to the Solomon Islands. With my disappointment, the guide cut my holiday shortly by 2 days. He also sent me to the same places I had visited them the year before. In addition, the holiday I go on included none of the activities mentioned in the travel plan. To make matters bad, I had to share a double room with someone I did not know, despite the fact I had paid for a single room. Last but not least, my luggages arrived a week late because of the delay causes by the travel agency.