题目内容：

    An extremely enthusiastic truth seeker who runs the YouTube channel Bright Insight claims（声称）to have found the mysterious city of Atlantis and insists that its true location has been hiding in plain sight for thousands of years.

In a video, YouTube blogger Jimmy Bright argues that the Richat Structure, a geologic dome（穹状物）in northwest Sahara also referred to as the Eye of the Sahara, is the most likely location of Atlantis.

He mentioned measurements from the famous Dialogues of Plato, which gave birth to the mystery. The Greek philosopher（哲学家）claimed that Atlantis was a long-gone kingdom, which stretched into Europe as far as Italy and into Africa as far as Egypt thousands of years ago. The giant island was said to be wiped off the face of the planet by a natural disaster“in a single day and night of misfortune”.

At first sight, this has nothing to do with the land-based Richat Structure, but Jimmy claims that the so-called Younger Dryas theory could be a possible explanation. According to it, a massive change in global temperatures caused unexpected climate change and sea level to rise.

In what can be viewed as another proof to the Sahara theory, the diameter（直径）of the Richat Structure’s outer circle is 23.5 km according to Google Map’s measurements, which matches those mentioned by Plato — 127 stadia, which is roughly 23.5 km in today’s terms.

Another thing that helps solve the mystery is a theory that the Eye of the Sahara closely matches the description from Plato’s dialogues. The ancient philosopher wrote that the main city of Atlantis consisted of circles of water and land, which, Jimmy said, looks very similar to the circular form of the Richat Structure.

Although the majority of researchers believe that Plato’s story was nothing but a moral story used to describe a failed idea of seeking power and searching for fortune, it has raised quite a few theories, Since the Middle Ages, explorers have been pointing fingers at different places around the world, including the Atlantic Ocean and the Mediterranean Sea, with the most amazing theories linking the location of Atlantis to the Antarctic and the North Sea.

1.What does Jimmy Bright claim to have discovered?

A. The most likely location of Atlantis.

B. The formation of the Richat Structure.

C. The measurements in the Dialogues of Plato.

D. The reasons behind the Younger Dryas theory.

2.How did Jimmy Bright do research into the location of Atlantis and arrive at a conclusion?

A. By studying the history of ancient Egypt.

B. By analyzing the research into Plato’s life story.

C. By explaining the Younger Dryas theory in a scientific way.

D. By comparing the Richat Structure with the famous Dialogues of Plato.

3.What’s the purpose of mentioning the Younger Dryas theory in Paragraph 4?

A. To stress the importance of the Richat Structure.

B. To present the influence it had on Atlantis.

C. To prove that Jimmy Bright might be correct.

D. To show Jimmy Bright’s opinion is unique.

4.What can be learned from the article?

A. The Eye of the Sahara is a mystery mentioned in the Dialogues of Plato.

B. The Richat Structure is where the mysterious city of Atlantis used to lie.

C. The Younger Dryas may have caused the disappearance of Atlantis overnight.

D. The Plato’s Story is meant to inspire explorers to locate the exact position of Atlantis.