Listen to a short passage three times. When the passage is read for the first time, listen for its general idea. When the passage is read for the second time, fill in the blanks with the exact words you hear. When the passage is read for the third time, check what you have written. Rock climbing is an activity in which participants climb up, down or across natural rock formations or artificial( 人造的 ) rock walls. The goal of rock climbing is to reach the top of a formation or the endpoint of a predefined route without falling. Rock climbing competitions have 1) __________ of completing the route in the quickest possible time or reaching the 2) __________point along an ever increasingly harder route. While not an Olympic event, rock climbing is 3) __________ by the International Olympic Committee as a sport. Rock climbing has been 4) __________ several different styles and subdisciplines (分支) . At its most basic, rock climbing 5) __________ climbing a route with one's own hands and feet and little more than a cushioned bouldering pad for protection. This style of climbing 6) __________ as bouldering, since the relevant routes are usually found on boulders no more than 10 to 15 feet tall. As routes get higher off the ground, the increased risk of 7) __________ injuries makes additional safety measures necessary. Climbers will usually work in pairs and use a system of ropes and anchors 8) __________ to catch fallers. Rock climbing is a physically and mentally demanding sport that tests a climber's strength, 9) __________ , and balance along with their mental control. It can be a dangerous sport and climbers are 10) __________ when they go climbing. However, the risk can be reduced by having the knowledge of proper climbing techniques and using specialized climbing equipment.