Đề bài: Read the passage and choose the best option to answer the following question. Write `A, B, C` or `D` on your answer sheet. One of the seven wonders of the ancient world, the Great Pyramid of Giza was a monument of wisdom and prophecy built as a tomb for Pharaoh Cheops in `1720` B.C. Despite its antiquity, certain aspects of its construction makes it one of the truly wonders of the world. The thirteen-acre structure near the Nile river is a solid mass of stone blocks covered with limestone. Inside are the number of hidden passageways and the burial chamber of the Pharaoh. It is the largest single structure in the world. The four sides of the pyramid are aligned almost exactly on true north, south, east and west-an incredible engineering feat. The ancient Egyptians were sun worshippers and great astronomers, so computations for the Great Pyramid were based on astronomical observations. Explorations and detailed examinations of the base of the structure reveal many intersecting lines. Further scientific study indicates that these represent a type of timeline of events past, present and future. Many of the events have been interpreted and found to coincide with known facts of the past. Others are prophesied for future generations and are currently under investigation. Many believe that pyramids have supernatural powers and this one is no exception. Some researchers even associate it with extraterrestrial beings of the ancient past. Was it superstructure made by ordinary beings, or one built by a race far superior to any known today? `1.` What has research of the base reveal? `A.` There are racks in the foundation. `B.` Tomb robbers have stolen pharaoh's body `C.` The lines represent important event `D.` A superior race of people built it. `2.` Extraterrestrial beings are ____________.