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　　A The dry climate of Egypt has helped to preserve the pyramids, and their very shape have made them less likely to fall into ruin.
　　B It is practically certain that plans were made for the building of the pyramids because the plans of other large works have fortunately been preserved.
　　C The first thing they had to do was to choose a suitable place.
　　D Consequently, we are only able to guess at the methods used
　　E Many people were killed while building the pyramids.
　　F They have stood for nearly 5,000 years, and it seems likely that they will continue to stand for thousands of years yet.