【ThestudentsattheAmericanInternationalSchoolwereexcited．Theyworkedhardtoraise（66）___foratrip．Theywashedcars，soldmagazinesandcollectedbottles．Finally，theyflewtoCairotovisitthepyramids（金字塔）ofEgypt!】

　　The students at the American International School were excited．They worked hard to raise （66）___ for a trip．They washed cars，sold magazines and collected bottles．Finally，they flew to Cairo to visit the pyramids （金字塔） of Egypt!

　　The students studied the pyramids in school before the trip．They learnt about the Pharaohs，the rulers of ancient Egypt．They also learnt that the Egyptians considered the Pharaohs to be living gods，and that the pyramids were （67）___ as tombs （陵墓） of the Pharaohs．

　　On the first day of the trip，the students went to the Great Pyramid at Giza．It was built for the Pharaoh Khufu around 2，560BC．It's the （68）___ pyramid in the world．At first，it was about 147metres high．Now it is about 137metres high．The students measured （测量） all four （69）___ of the Great Pyramid at Giza．

　　No one knows how the ancient Egyptians built these huge things．Scientists believe Egyptians didn't invent the wheel at that time．They guess people moved the stones very slowly．Thousands of Egyptians worked for many years on each pyramid．When the students returned home，they prepared speeches and invited the community．Everyone was （70）___ by how much the students learnt．

　　A．sides B．built C．tallest D．money E．shocked．