he guage to learn? difficult 5 Write the words in the correct form (normal adjective, comparative or superlative). Most of the questions in exercise 2 are (1) difficult (difficult) to answer. Some have a clear answer. For example, the (2) (big) animal in the world is the blue whale. It can grow to 30 metres (3) (long), and can weigh 190 tons. And the cheetah is the (4) (fast) runner A cheetah can run at 120 kilometres per hour - but some birds are (5) - (fast) than that! At the moment, the world's (long) bridge is in China. It's called the Danyang-Kunshan Grand-Bridge and it's 164.8 kilometres long! (long) one tomorrow. We know which type of tree is the (tall) in the world. That's the coast redwood tree. Coast redwood trees are in (tall) coast redwood we know about is 115.56 metres (tall) trees we don't know about. We don't really know (old) building in the world is. There are some stone circles in Africa that But someone might build a (7) . (8) - California in the USA. The (9) tall, but there may be other (10) what the (11) Р P are 1,750,000 years old! Are they buildings? It's (12) (difficult) to say. Some people think Viswanathan Anand from India is the (13) (good) chess player in the world, but other people might think that someone else is (14) (good). What's the (dangerous) sport? Is it diving? Rafting? Street luge? (If you don't know what that is, look it up on the internet!) People disagree. And what's the (16) (difficult) language to learn? Well, that depends what language you speak already! ter. (15) - n's.