9. Choose and copy the correct answer for the numbered blanks below. Rewriting is not compulsory. [5x0.5=2.5] A third of all households around ............... (a/an/the) world have a dog. These playful, friendly, loyal animals............... (make/makes/made) great companions, but they can also be fierce and tough protectors or intelligent helpers. Dogs were the first animals domesticated by humans, over 20,000 years ago! As they evolved from wolves, their skulls, teeth and paws shrank, and they became more docile. The dogs are obedient ..... 3........ (at/of/to) their masters. Evidence from fossils suggests that five types of dogs had evolved. These were mastiffs, wolf-type dogs, dogs similar to greyhounds, pointing dogs and herding dogs. They can learn over 100 words and gestures. Dogs are tamed and used in investigation ......4...... (since/because of/so that) they are much easier to train. Dog noses are at least 40 times more sensitive than ours. These clever canines have an incredible sense of smell; allowing them to follow scent trails days after they were left. If you leave them even in the dense forest, they.......5....... (can't find/can find/could find) the way to home easily. Many dogs are trained to work as guide dogs, helping blind people get around safely. Others are assistance dogs, that keep their owners calm and safe, while some brave hounds are search and rescue dogs, that help human rescuers save people from danger.
