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 Read and answer the following questions.

 If you fly over the Nazca Desert along the southern coast of Peru, you will see huge drawings in the sand: a monkey, a spider, flowers, triangles, rectangles, zigzags, spirals, even human forms with crowned heads. Also, straight lines can e seen spreading out from a circle, like spokes in a wheel. (가) Some drawings ① are more than ② six hundred feet ③ from an end to an end, longer ④ than two football ⑤ fields. Some continue for miles, up hills and down valleys. In all, the markings cover 250 square miles of desert. Some drawings are so large that you ca tell what they are only by looking at them from the air. But no one knows how they got there, or why.

 We do know they were made abut two thousand years ago by South American Indians called the Nazcas. The Nazca people lived in a green valley just below a huge stretch of desert called the pampas, meaning "flat place." The air around the pampas is hot and dry, and the pampas gets only about half an inch of rain each year. So the markings made long ago on its sandy, stony surface have not been worn away by the weather even after two thousand years.

1.  (가) 문장에서 틀린 것을 고르시오.¹⁾