(CNN) — This photograph of two men sharing a drink 30 meters below the water is part of an art project exploring the mysterious world of freediving — a form of underwater diving that relies on a diver’s ability to hold his or her breath until resurfacing rather than on the use of oxygen tanks (氧气瓶).

Each man, dressed in shirt, jeans and sunglasses, sits in a chair at the bottom of the Caribbean Sea with local sharks — harmless to humans — swimming just meters away. Of course, these aren’t ordinary men, but freedivers: extreme athletes who dive on a single breath of air.

American photographer Lia Barrett had been taking pictures of brave divers competing at the Caribbean Cup off the coast of Honduras, when she decided to create a fantastic underwater world in which humans go about everyday tasks — such as drinking coffee or riding bikes.

“After the competitors had a great time in the new national and world records set at the competition, I took advantage of their breath-holding skills to do photo shoots I had only dreamed of before,” said the 29-year-old.

Perhaps unsurprisingly, Barrett is often asked whether the amazing pictures are Photoshopped. She laughs quietly as she insists they’re 100% real.

The picture of two men having coffee took 50 minutes to create, with the men receiving oxygen from standby assistants around every three minutes.

“On the way back up, we were holding onto the table during our decompression (减压) stop in the strong current (水流) — it was quite a scene.”

The underwater models made an 11-minute stop on the way back to the surface, making sure they didn’t rise too quickly and suffer decompression sickness — which can cause deadly blackouts (眩晕).

【小题1】The photograph mentioned in the first paragraph _____.

A．has set a new world record

B．aims to call on people to protect sharks

C．realizes the photographer Barrett’s dream

D．is one activity of the Caribbean Cup

【小题2】The Caribbean Cup held off the coast of Honduras mainly shows competitors’ _____.

A．swimming skills

B．Photoshop skills

C．photography skills

D．breath-holding skills

【小题3】Many people think the picture of two men having coffee below the water is _____.

A．not real	B．not perfect
C．not surprising	D．not interesting

【小题4】Why did the two models make an 11-minute stop on the way back to the surface?

A．To have more photographs taken.

B．To enjoy the underwater world.

C．To bring back the table.

D．To avoid getting sick.