问题详情

___________ 查看材料
A.for stone to use in modem buildings
B.has made them less likely to fall into ruin
C.before they could begin to build
D.because the plans of other large works have fortunately been preserved
E.while building the pyramids
F.they will continue to stand for thousands of years yet请帮忙给出正确答案和分析，谢谢！