【17~22】
      Long time ago, there was a proud (驕傲的) rabbit. He was very good at   17  ,and everyone loved him. The rabbit didn't like the turtle because the turtle was always slow. He often said to the turtle, "You're good at nothing!" One day, the turtle was angry and he asked the rabbit   18   a race with him, and the rabbit said yes. The next day at about three in the afternoon, all the animals got together to watch the race. "Ready, set, go!" The rabbit began running, and soon the turtle was far (遠地) behind. "What an easy race!" the rabbit thought. He then decided (决定) to take a   19   under a tree. The weather was so nice, and the rabbit was soon in a sound sleep. The turtle walked and walked. It was ten to six, and still the rabbit   20   under the tall big tree. The turtle kept   21  . He didn't stop until(直到) he got to the finish line. The rabbit suddenly   22   at six, but it was too late. After the race, the rabbit went up to the turtle and said, "I'm sorry I always laughed at you. It's wrong to do so."
【題組】17.
(A) ran
(B) runs
(C) run
(D) running