题目

An enjoyable trip On October 28th, we began our exciting trip to the world-famous sand island—Fraser Island, which is said to be the world largest sand island and it is one of the world cultural heritages (遗产). We were really amazed by the spectacular view there. The road to the island is really tough and bumpy. The bus driver, who was also our guide was a very strong man. He was optimistic (乐观的) and helpful. I found he was all smiling on the way though the ride was not very smooth. We stopped for several times because the cars in front of us were blocked by sand. The road was comp用简便方法计算．（1）（2）2.5×4.4（3）（4）．