Part B

Directions

The following paragraphs are given in a wrong order. For questions 41-45， you are required to reorganize these paragraphs into a coherent article by choosing from the list A-G and filling them into the numbered boxes. Paragraphs A and E have been correctly placed. Mark your answers on ANSWER SHEET. （10 points）

[A] Some archaeological sites have always been easily observable-for example， the Parthenon in Athens， Greece； the pyramids of Giza in Egypt； and the megaliths of Stonehenge in southern England. But these sites are exceptions to the norm. Most archaeological sites have been located by means of careful searching， while many others have been discovered by accident. Olduvai Gorge， an early hominid site in Tanzania， was found by a butterfly hunter who literally fell into its deep valley in 1911.Thousands of Aztec artifacts came to light during the digging of the Mexico City subway in the 1970s.

[B] In another case， American archaeologists Rene Million and George Cowgill spent years systematically mapping the entire city of Teotihuacan in the Valley of Mexico near what is now Mexico City. At its peak around AD 600， this city was one of the largest human settlements in the world. The researchers mapped not only the city 's vast and ornate ceremonial areas， but also hundreds of simpler apartment complexes where common people lived.

[C] How do archaeologists know where to find what they are looking for when there is nothing visible on the surface of the ground？ Typically， they survey and sample（make test excavations on）large areas of terrain to determine where excavation will yield useful information. Surveys and test samples have also become important for understanding the larger landscapes that contain archaeological sites.

[D] Surveys can cover a single large settlement or entire landscapes. In one case， many researchers working around the ancient Maya city of Copan， Honduras， have located hundreds of small rural villages and individual dwellings by using aerial photographs and by making surveys on foot. the resulting settlement maps show how the distribution and density of the rural population around the city changed dramatically between AD 500 and 850，when Copan collapsed.

[E] Te find their sites ，archaeologists today rely heavily on systematic survey methods and a variety of high-technology tools and techniques ，Airborne technologies ，such as different types of radar and photographic equipment carried by airplanes or spacecraft ， allow archaeologists to learn about what lies beneath the ground without digging ， Aerial surveys locate general areas of interest or larger buried features， such an ancient buildings or fields.

[F] Most archaeological sites ， however ， are discovered by archaeologists who have set