The Limits of Our Knowledge - Page 103

C2 Proficiency · Open Cloze · Ready for C2 Proficiency Student's Book, Macmillan

For questions 1–8, read the text below and think of the word which best fits each gap. Use only one word in each gap.

Given the astonishing list of discoveries and achievements (0) ___ by modern scientists, you might think that we would understand our own bodily processes back to front, but you'd be surprised at the many things still (1) ___ uncovered about the human body. One such discovery revolves (2) ___ why we dream. While we can say (3) ___ some degree of certainty that dreaming is an essential function and vital to our health, scientists are still at a (4) ___ as to why memories of dreams are random or why we dream in the first place. And as for why we yawn – the once prevailing theory that we yawn to gain oxygen and thus keep us awake has now been (5) ___ into question, and some now hypothesise that we actually yawn to cool down the brain. Finally, don't bank (6) ___ laughter as just being a simple reaction to your off the (7) ___ humour either. Studies have shown that, in fact, it is a social tool to form bonds rather than a reaction to anything funny. So, the next time someone laughs at your jokes, remember, they could just be trying to get you on (8) ___ !

The Limits of Our Knowledge

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