Happy Trails is a brand-new, two-level primary course which contains National Geographic photography and content enabling students to learn about our world while learning English. The book follows the adventures of Ty a panda, Leo a leopard and Mia a meerkat as they explore the world and send video updates to their friend Trek. В рабочей тетради во всех заданиях впечатаны ответы красным цветом.