5 Complete. (5 points)

Решение:

1. Burj Khalifa, in Dubai, is the tallest (tall) building in the world. It is 828 metres tall!
2. The bee hummingbird is only six centimetres long. It's smaller (small) all other birds.
3. The Dodge Tomahawk is the fastest (fast) motorbike in the world. It can go 560 kilometres per hour!
4. At 6,700 kilometres long, the Nile River in Africa is longer (long) than the Volga River in Russia. It's 3,500 kilometres long.
5. Siberian tigers are smaller (big) Bengal tigers.

Ответ: 1. the tallest, 2. smaller, 3. the fastest, 4. longer, 5. smaller.