小题1:B
小题2:A
小题3:B
小题4:C
小题5:B
主旨大意：这篇短文主要介绍了世界各地的有趣的建筑。
小题1:根据第一段When you see a picture of a famous concert hall that reminds you of a sailing ship, you probably know it is the Sydney Opera House in Australia.，描述，可知悉尼歌剧院像一条扬帆远行的船。故选B。
小题2:根据短文第三段In Guizhou, China, people can visit the Meitan Tea Museum, built in the shape of a giant teapot.描述，可知选A。
小题3:联系后一句hat is shaped like a huge tea cu描述，可知此处指的是一个大茶壶。故选B。
小题4:根据短文倒数第二段The three-story building is shaped like a guitar lying on its side. 描述，可知这是一座三层楼高的建筑。故选项C描述错误。
小题5:根据短文第一段Buildings like these are easily recognized everywhere in the world. They were designed to look like other things if people use their imaginations.描述，可知鸟巢体育馆和悉尼歌剧院是仿生建筑的例子。故选B。