1、In my _______(意见), we should further know more about excellent _______(传统). You can _______(识别) different customs by _______(比较) and _______(对照).
2、The _______(数码的) _______(形象) of the Mogao _______(洞穴) were so popular that they were spread _______(遍及) the whole world over the Internet.
3、The _______(考古学家) is in the _______(过程) of studying the structure of the _______(入口) and _______(屋顶) of some _______(历史上著名的) heritage，such as pyramid, the Great Wall and so on. So he often travels _______(在海外).
