埃及的金字塔是如何建成的依然是个谜。 How Egyptian pyramids were built still _______ a mystery.
举一反三
- the pyramids were built by __________/module/audioplay.html?objectid=510c56d0ec12723cbac2b45d11ddbc8e
- The pyramids were built by piling one stone block upon _____.
- 四千多年前古埃及金字塔是如何建成的至今还是个谜。有些人猜测它们是外星人建造的。（speculate）
- 埃及的金字塔埃及金字塔是怎样建成的?
- The Pyramids of Egypt were built more than three thousand years a90，and no one knows__________.[1分]