Alexander Tsao, a keen rock climber for several years, was climbing the walls at a gym near his home in Redmond, Washington, when he noticed that the ropes were frequently being replaced with new ones. Just 16 at the time, Tsao wondered what happened to the old ropes. He asked the gym owners and found out the ropes had to be discarded regularly due to safety regulations. He was surprised to find that so many ropes were sent to landfills.This discovery inspired him to find a solution to the environmental issue of climbing rope waste. He considered possible ideas and ways to up cycle the discarded ropes, deciding to turn them into leashes (拴狗带) for dogs.Once he had made his plan, Tsao contacted all the climbing gyms in Washington State, introducing his idea of recycling old ropes. Some were doubtful at first, but many gyms agreed to donate their used ropes. Tsao spent months testing and designing his products and filling documents to become a nonprofit organization which he called Rocks2Dogs.To make the leashes, Tsao and volunteers first wash and dry the ropes. They cut them into different lengths, ranging from4 to 10 feet, and then burn the ends to prevent them from fraying (磨损). They add a clip and handle to each end, and cover the leash’s hardware with shrink tape.Because making the leashes now is a full-time job, Tsao has asked his friends, family and neighbors for help. “We have made and sold over a thousand leashes, which add up to over 10,000 feet of rope being saved from landfills,” says Tsao. The leashes come in various colors. There are also half-price leashes made from ropes with slight imperfections. These start at 7.49 while most other leashes start at 14.99. To date, the nonprofit has raised more than 35,000. Much of this money has been donated to animal shelters.【小题1】What did Tsao discover?A．Rock climbing might do harm to health.B．The gym didn’t obey safety regulations.C．Many old climbing ropes went to waste.D．Landfills caused damage to the environment.【小题2】What was Tsao’s plan?A．To call on climbing gyms to donate ropes.B．To transform retired ropes into dog leashes.C．To upcycle old leashes saved from landfills.D．To set up an environmental organization.【小题3】What does paragraph 4 mainly talk about?A．Efforts to promote the ropes.B．Reasons for starting Rocks2Dogs.C．Ways to reuse discarded waste.D．Steps for making the leashes.【小题4】What is the last paragraph intended to tell us?A．Tsao succeeds in the leash business.B．Animal protection gain’s more attention.C．More people volunteered to help Tsao.D．Leashes are very popular with pet owners.