11、[阅读理解]what does the author say about dog training? A. It requires professional guidance. B. It is necessary for every dog. C. It gives dogs good exercise. D. It is an easy job for trainers.
12、[阅读理解]What is the most important thing for dog trainers to do? A. Learn to communicate with dogs B. Give dogs timely encouragement. C. Create right circumstances for dogs. D. Teach dogs desired behaviors.