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READ THE TEXT BELOW AND THINK OF THE WORD WHICH BEST FITS EACH SPACE. USE ONLY ONE WORD IN EACH SPACE.
Taste.

We take it 1.___granted that when we put something in our mouths, we taste it. But why 2.___our bodies be able to detect chemicals in this way? In order 3.___answer that question, we need to consider two things: the dietary requirements 4.___our bodies and the risks associated 5.___eating.

Our bodies need certain substances 6.___a regular basis, including vitamins,carbohydrates and salt. The flavour of food, 7. ___as fruit, gives us important information 8.___ the nutrients it contains. Sweet tastes mean sugar, which 9.___turn means high energy levels. Salty tastes indicate the presence of other chemicals we need 10.___sugar. Because we find these pleasurable, we tend to eat food that 11.___high in these substances.

Bitter or sour tastes, on the other hand, usually act 12.___nature’s warning devices.When something is poisonous, it usually 13.___a bitter flavour, a taste 14. ___we naturally dislike. Also, as food 15.___off it tends to develop a sour taste. This means that we are able to avoid food that could cause health problems.