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Learn about intensifiers and mitigators such as really, extremely, rather and quite and do the exercises to practise using them.

Learn about different determiners like the, their, these, any and other and do the exercises to practise using them.

Learn about the structure of noun phrases and do the exercises to practise using them.

Learn about some common words that have no singular form and do the exercises to practise using them.

Learn about some common nouns that refer to groups of things like army, audience, staff and company and do the exercises to practise using them.

Learn how to use nouns to say more about other nouns, and do the exercises to practise using them.

Guy Martin is a professional motorbike racer. In this video, he tries to ride a motorbike on water. Can he ride fast enough to do it?

A cuttlefish is a common sea animal with an amazing ability to change appearance. Are there any limits to this ability? Watch this video to find out.

We usually think of fruit as a healthy food. But could it also have some negative effects?

Dolphins are much more intelligent than humans when it comes to fishing: they don’t even need a net. Watch this video to see how they do it.

Learn how to write about trends in a bar chart.

Cucumber or grapes? What happens when two monkeys do the same task but get 'paid' in different ways? Watch this funny video to find out how monkeys react to inequality.