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uilt them. Why do they think so? Reasons: The blocks are so heavy and the pyramids are so high。 …… Egyptians Aliens Who built them? How did they build them? B. Writing an outline Work in groups and write an outline of the mysterious story about pyramids . ② ① ____________________, Egyptians or aliens? ______________________ whether the Egyptians built them. They believe aliens built them.... ____________________ the Egyptians built them... I hope that _________________ Body Scientists have been searching for the people who built the pyramids for years, but it is still ________. Title Beginning Ending Who built the pyramids a mystery Some scientists believe But some scientists doubt the mystery will be solved someday... Write the story ② ① Who built the pyramids, Egyptians or aliens? But some scientists doubt whether the Egyptians built them. They believe aliens built them.... Some scientists believe the Egyptians built them... I hope that the mystery will be solved someday... Body Scientists have been searching for the people who built the pyramids for years, but it is still a mystery. Title Beginning Ending Write