Dogs in a human world close up b1 unit4 p.44

Wild dogs have existed for approximately 14,000 years.

• true

• false

Humans are responsible for the different kinds of dogs in the world.

• true

• false

All airports in the United States use beagles to check for food.

• true

• false

Some foods are not safe because they can carry sicknesses.

• true

• false

Tiffy eats home-cooked meals, not normal dog food.

• true

• false

Jessie doesn't help the patients in hospital.

• true

• false

Service dogs can do simple tasks for people who cannot walk.

• true

• false

SAR dogs use their sense of smell to find people who are lost.

• true

• false

Dogs that love to chase a tennis ball do not need rewards.

• true

• false

It is possible that one day there will be no more wolves.

• true

• false