请仔细阅读56—60小题及下面六个网站介绍(A、B、C、D、E和F)，选出符合Thomas、Melanie、Arthur、Darrel、David五人各自需求的最佳选项，其中有一选项为多余。

小题1:Thomas is a student from Japan, studying in Eastland High School. He has some problems with some English words and expressions. So he turns to some proper website for help.

小题2:Melanie is a high school student and wants to learn some hot technology news by reading some books in this field during the coming summer vacation. She wants to know where to get such books.

小题3:Arthur is a young school teacher and wants to take a long journey to Germany with his family by air. He hopes to get low-priced airline tickets and deeply discounted hotel rooms. In order to do this, he draws his attention to the websites.

小题4:Darrel’s father is a successful businessman. He is excited about his father’s job and decides to follow him. So he’d like to make good use of time in the summer holiday to learn some practical business English. How can he find a place where his dream can come true?

小题5:David is a student of English coming from Africa and used to have many difficulties in his English study. He decided that he would get some free English learning materials to read and with the help of his friends, he wanted to find a website for his purpose.

ESD、SIS、ITCC的中文简称分别是什么？