【正文】 rch on it. D. To display it for visitors. 51. What would be the best title for the passage? A. The biggest squid ever found B. Scientific research on squid C. The lifestyle of the colossal squid D. How the fishermen caught the squid E★★ Have you ever heard the saying “ All roads lead to Rome” ? At one time, this was pretty much true. During the Roman Empire, lots of roads were built in order to move armies, send messages by courier (信使 ), and make trade easier. This construction work went on for five centuries!If all the roads built during the Roman Empire were put together end to end, they would circle the equator twice. The work of Roman roads was begun in 312 BC. It was demanded that the roads be built strong so that they would not fall down. Roman soldiers, supervised (監(jiān)督 ) by engineers, laid down the roads in a special pattern of layers. The first layer was made of sand. Next, the builders added rocks and rubble. On top of these materials came gravel. On this solid foundation, the road builders placed paving stones. Also, Roman roads were cambered. This means that they were built higher in the middle than on the edges, allowing rainwater to run off, which prevented flooding. We use the same technique in building roads today. The Romans also laid out roads over hills when necessary, setting them down in a zigzag pattern to make the road rise gradually. All Roman roads had milestones (里程碑 ), placed every thousands paces (a Roman mile). The milestones told when the road was built, who was emperor at the time, the road’ s destination, how far the traveler was from the destination, and how many miles had been traveled since the beginning of the road. This information was a great help to travelers. Because of their excellence in construction, it really is no surprise that many parts of Roman road still exist today. These roadways are one of the most impressive acplishments of the Roman Empire. 52. What does the underlined sentence in the first paragraph mean? A. The Roman Empire was very powerful. B. Lots of roads were built during the Roman Empire. C. The roads built during the Roman Empire were very long. D. The roads built during the Roman Empire were very convenient. 53. Which of the following correctly shows the structure of the Roman roads? A. Paving stones Gravel Rocks amp。 2nd3rd) and Acting (4th6th), the classes will explore characters, expression and creativity through creative dramatics (表演 ) activities. Full $80 payment per student is required for enrollment (入學(xué) ). Classes will be filled firstefirstserved. For questions or to enroll, contact Nancy Schaeffer at 2149780110 or . Tuesdays 4:005:30 April 22May 13, 2021 Play Days — PreK Explore the wonderful characters from your favorite books Act out the stories you know so well and maybe a few new ones too! Take turns being on the stage with your class as you bee many fun and creative characters Act It Up! Grades K1 amp。 C. Six of us drove to the coast. It was the first time we’d been off the base on our own without our field assistant, so it had a slightly different feeling — more like a few friends going to the seaside than an Antarctic field trip! When we reached Windy Creek, we luckily caught sight of quite a few small flying seabirds, which are seldom seen there. Once on the sea ice we found that some of the more curious penguins had wandered over from the main group to e and check us out. We’ d been told that then they were nursing their chicks (剛孵出的幼雛 ) and they would be more careful and nervous than last time, but that didn’t seem to be the case. We walked across to the main group which were stretched for a couple of miles along the coast. We sat down for some sandwiches and soon found ourselves surrounded by many curious observers. Without any attackers on land, they were very brave and came within a meter of us to pose (擺姿勢(shì) ) for photos. Before heading back, we spent a few hours on the sea ice watching the penguins and their chicks, which had grown dramatically (明顯地 ) since our last visit. It was such a nice day. 36. W