从方框中选择适当的单词，将短文补充完整。 what, blind, coach, helping, something, though, specially, elementary, out, how Have you ever seen guide dogs? Guide dogs are the best 'helping hands' for the __ 1 __. Most guide dogs are both their eyes and their good friends. __ 2 __ makes dogs become guide dogs? The __ 3 __ requirement (要求) is that a guide dog must be healthy and have a good temper (脾气). Second, one of the dog's parents must be a guide dog. Third, when they are two months old, they would be sent to the training center. People there __ 4 __ them how to get along with people. Then they can understand __ 5 __ to help people. Fourth, when they are one year old, they have to return to the training center to learn more skills about __ 6 __ people. Then, if they pass the test, they will be guide dogs. Guide dogs help the blind __ 7 __. Can other animals help disabled people? Now, some other animals are being trained to help them. In the USA, some monkeys have been __ 8 __ trained to help those people that can't move any more. The monkeys can put a CD into the CD player, open the fridge (冰箱) to get __ 9 __, turn on the light and even hand the owner the TV remote control (遥控器). __ 10 __ these are simple tasks, the monkeys have to have about 18 to 24 months'training to be able to do them. Animals are not only people's pets, but also our best helpers.