Frank, the dog, is very friendly. He loves meeting new people and going out with his friends. He has a lot of friends! One of his very good friends is a blue robot  named Bob. Bob is a nice robot. A long time ago, Bob saved the world. But now, he lives a quiet life. Another great friend of Frank's is Hops,the rabbit. Hops is special( ) because he is good at every subject, especially math and science. He likes teaching others what he knows, and he's always making all kinds of inventions.  An old friend of Frank's is Ted. Ted and Frank are both dogs, they're a little different. Frank is always trying new things-sometimes silly things! Ted, However, likes doing sensible  things more than doing fun and crazy things. But both he and Frank love learning and care about doing what's right more than anything. So to them, their differences are small. Hops is special because  _  .
he saved the world. he likes his math teacher he is good at every subject he is always doing what's right