1 . Renata Di Pietro was studying to be a singer at the University of Iowa. But at 23, she found she couldn’t see clearly. Soon, it, became increasingly   _______   to read scores and pick up hand signals from conductor(指挥），and Renata was forced to _______ .

For years, Renata depended on guide dogs to _______. But finally, she found it heartbreaking. A dog’s working life is _______— just six to 10 years before it ages out of service or dies. “It’s very _______, because you love each one.” she says.

In 2009，while   _______ another guide dog, Renata was interested by_______ from a friend that miniature horse(小矮马）usually live for thirty years and make calm and strong guides. They are very _______: There are only about ten of them working in the United States.   _______ choosing a guide dog, Renata decided to turn to a mini horse—and the ________   as changed her life. Renata   ________ with a male horse, but he was too hard to ________   . Angel came next, a white female horse Renata has mostly trained herself. “ Horses naturally ________   obstacles(障碍），she says. If I am about to ________ something, she moves her body in front of me.

Renata has taught her ________ to react to directional commands. “Angel can________ a chair and the nearest door for me,” Renata says. Now, she's ________ Angel to pull her wheelchair.

Despite (尽管）her   ________       , Renata still gives performances with her husband, musician Carl Hummer, at special events. Angel is   ________ by her side. “l fight a battle every day to get the courage to take part in life,” Renata says. “Angel is my warhorse. We fight that battle________. ”