Решение:
Dogs have been MAN'S BEST FRIEND for thousands of years. Many experts think that around 20,000 years ago, wolves and humans started to live side by side. Over time, some wild animals became tamed. For example, wolves chased away dangerous animals. They became dogs by accident.
One of the reasons is that dogs are CLEVER. They can LEARN more quickly than other animals.
Most dogs learn new behavior in just four tries. If you have a dog, think of a new TRICK. When your dog DOES a command, offer a small treat and say "Good dog!"
To AVOID BECOMING a treat dispenser, keep the instruction enjoyable for the best results.