A nine-meter long hidden passageway was discovered inside the Great Pyramid of Giza, Egypt’s tourism minister Ahmed Issa announced on Thursday. The finding was made by researchers from the Scan Pyramid project, an international mission that since 2015 has been using modern methods to explore the internal structure of the pyramid.

The gabled(有三角墙的) ceiling of the secret tunnel suggests it was built to lighten the load on the structure, Mostafa Waziri, head of Egypt’s Supreme Council of Antiquities told reporters at the pyramid site. “But a big question mark hangs over whether this corridor was created to relieve the weight on the [main] entrance or lighten the load on a space yet to be discovered,” he added. “Scanning work will continue to uncover more secrets of this structure.” 

The Great Pyramid, the largest of the Great Pyramids of Giza, is the last surviving wonder of the ancient world. It was built as a royal tomb some 4,500 years ago during the reign of Pharaoh Khufu. A chevron(V形) technique was used in building the pyramid to cover internal structures and prevent them from collapsing. Scientists say the detection of any previously unknown internal structures could lead to a better understanding of the construction process of the ancient monument.

In 2017, the same team of scientists discovered a large void(空间), which they said was the first major inner structure found in the Great Pyramid since the 19th century. They found another unknown cavity(洞) on the north eastern edge of the Pyramid the year before.

1.What does Paragraph Two mainly talk about?

A The function of the corridor.

B The ceiling of the secret tunnel.

C The structure of the pyramid.

D The hidden secrets of the structure.

解析：选A。A段落大意题。根据第二段关键词“suggests it was built to”“this corridor was created to”可知，本段主要讨论的是该通道的作用。故选A。

2.Why was the Great Pyramid built?

A To become a wonder of the world.

B To bury the dead from the royal family.

C To prevent the building from collapsing.

D To better understand ancient life.

解析：选B。B细节理解题。根据第三段第二句的“It was built as a royal tomb”可知，这个金字塔最初是修建来作皇室的坟墓的。故选B。

3.What can we know about the finding according to the text?

A It was about a ninety-meter long tunnel.

B The passageway has been explored since 2015.

C It was one of the major inner structures of the pyramid.

D A different team of scientists discovered two holes before.

解析：选C。C推理判断题。根据倒数第二段最后一句“Scientists say the detection of any previously unknown internal structures could lead to a better understanding of the construction process of the ancient monument.”和最后一段可知，此次是关于金字塔主要内部结构的一次重大发现，前两次重大发现分别发生在2017年和一年前。故选C。

4.Where may this text come from?

A A science textbook.

B An announcement.

C A research report.

D A travel project.

解析：选C。C推理判断题。根据第一段主要内容可知，一组专门研究埃及金字塔的专家在金字塔内发现一条长9米的新通道，结合后文对这条通道的相关介绍可知，本文可能来自一篇研究报告。故选C。