A Christmas was near. I walked away from my school and followed the worn path through the trees onto the street 1 Cole’s grocery store stood. In my pocket was a collection of coins and bills I 2 (earn) the summer before. Cars ran down the street as I opened the door to the store. The noise of the cars disappeared when the door closed 3 me. I was a kid who felt out of place and on a mission. For the first time, I was going to buy a Christmas gift for my mum and dad. B Ac cording to a recent study, dolphins have displayed certain characteristics of human conversation in the ir communication. Two dolphins, Yana and Yasha, 4 (study) as they communicated with each other. Researchers found that they would stop talking in order to listen to 5 the other had to “say”, just like a conversation between two humans. Dolphins have been known to be one of the most intelligent 6 (animal) . We have studied dolphins for decades, but this new evidence on their communication patterns is one of the most exciting. C The Dunhuang Mogao Grottoes is a world heritage (遗产) site 7 (locate) in Gansu Province, Northwest China. In 2016, the first phase of the Digital Dunhuang resource database went online. Now people from all over the world can enjoy high-definition images and panoramic (全景的) tours of 30 caves on the Digital Dunhuang website. Digital Dunhuang 8 ( integrate) all kinds of data, including videos, 3D data, pictures and others, into digital images that can be shared globally over the Internet. Although the Digital Dunhuang project has a long way 9 (go), it has significant meaning to 10 ( culture) heritage protection.