单选题
Niagara Falls, Ontario, Canada—A man survived a plunge(跳入) over Niagara Falls with only the clothes on his back. He was the first person known to have done it without safety equipment and live.
Witnesses described seeing the man float by on Monday in the Niagara River, go head first over the 54-metre waterfall and then pull himself out of the water onto rocks below. Water rushes over the Falls at a rate of 570000 litres per second.
"He just looked calm. He was just going past so fast. I was in shock really to see a person go by," Brenda McMullen told a TV station.
"I saw him disappear over the edge of the falls," Brenda"s husband, Terry McMullen said. The American tourists took photographs afterwards, showing the man dressed in street clothes, apparently lying on the shoreline at the base of the Canadian Horseshoe Falls.
"The guy just basically jumped in the falls," said witness Diedre Love, who was there with her husband to celebrate their first wedding anniversary(周年纪念).
Only one other person was known to survive a plunge over the Canadian falls without a barrel or other equipment. This was a seven-year-old boy wearing a life jacket who was thrown into the water in a 1960 boating accident.
No one has ever survived a trip over the narrower and rockier American falls. Police would not release the man"s name nor would they tell the press why the man went over the falls. He did not appear to have serious injuries as he was led away. He was taken to the Greater Niagara General Hospital for treatment.

单选题 Why did the man jump over the falls?

单选题 What"s the correct order of the following events?
A．The man got on a rock below the falls.
B．The man was taken to a hospital.
C．The man jumped in the falls.
D．Two American tourists took photos of the man.

单选题 Why did the writer mention the 7-year-old boy in the passage?

单选题 In this passage the word "witness" probably means people ______.