Egyptians also built pyramids as 20 for their kings, or pharaohs.
答案：(D) tombs
語意「埃及人建造金字塔作為國王的『陵墓』」，tombs（陵墓）符合，呼應後文「金字塔裡存放法老的遺體」；galleries（畫廊）、landmarks（地標）、companies（公司）都不合。
金字塔在你腦中的第一個標籤大概是「著名地標」，所以 landmarks 特別誘人，句子讀起來也不奇怪。問題是這一句要說的不是「金字塔很有名」，而是「金字塔蓋來做什麼用」。
先看空格前後的結構：built pyramids as ______ for their kings, or pharaohs。as 在這裡是「當作、作為」，後面要接的是金字塔的用途或身分；後面的 for their kings 又限定了這個用途是為法老而設。決定性的線索在下一句：The pyramid housed the pharaoh’s body together with priceless treasure（金字塔裡安放著法老的遺體和無價珍寶）。裡面放的是遺體——安放遺體的建築就是陵墓，tomb。這是後文直接把答案講出來的典型設計，往下多讀一句就能定案。整段的脈絡也一致：這一篇從頭到尾在講埃及人對死後世界的信仰，木乃伊保存遺體、金字塔安放遺體，兩件事服務的是同一個主題。
galleries：畫廊、展示長廊，用來展示藝術品，不是安放遺體的地方。landmarks：地標，指的是辨識方位或知名的建築；金字塔的確是地標，但那是後世的看法，不是古埃及人建造它的目的，也接不上後面的 for their kings。companies：公司，與整段語意完全無關。
build a tomb for somebody（為某人建造陵墓）、serve as（充當、作為）、house something（存放、容納某物）、priceless treasure（無價珍寶）、accompany somebody（陪伴某人）、together with（連同…）。
When it comes to Egypt, people think of pyramids and mummies, both of which are closely related to Egyptian religious beliefs. The ancient Egyptians believed firmly in life 16 death. When a person died, his or her soul was thought to travel to an underworld, where it 17 a series of judgments before it could progress to a better life in the next world.
For the soul to travel smoothly, the body had to 18 unharmed. Thus, they learned how to preserve the body by drying it out, oiling and then 19 the body in linen, before placing it in the coffin.
Egyptians also built pyramids as 20 for their kings, or pharaohs. The pyramid housed the pharaoh's body together with priceless treasure, which would accompany him into the next world.