阅读下面的短文，文章有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。 The Building of the Pyramids
The oldest stone buildings in the world are the pyramids. (46)
. There are over eighty percent of them scattered along the banks of
the Nile, some of which are different in shape from the true pyramids. The most
famous of these are the "Step" pyramid and " Bent "pyramid. Some
of the pyramids still Rook much the same as they must have done when they were
built thousands of years ago. Most of the damage suffered by the others has been
at the hands of men who were looking for treasure or, more often, for stone to
use in modern buildings. (47) . These are good reasons why
they can still be seen today, but perhaps the most important is that they were
planned to last forever. (48) . However,
there are no writings or pictures to show us how the Egyptians planned or built
the pyramids themselves. (49) . Nevertheless, by examining
the actual pyramids and various tools which have been found, archaeologists have
formed a fairly clear picture of them. One thing is certain:
there must have been months of careful planning before they could begin to
build. (50) . You may think this would have been easy with
miles and miles of empty desert around, but a pyramid could not be built just
anywhere. Certain rules had to be followed, and certain problems had to be
overcome. 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