Điền 1 từ thích hợp đã cho trước vào ô trống
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Cauuse ; pulled ; treat ; decay ; sugar ; wear ; eat ; teeth ; middle-age ; thought -----------------------------------------------------------------------------------------------------------------------------------------------------------
Many people nowadays have to......(1)........ false teeth when they are ........(2)....... . The reason is that tooth........(3)...... increases a lot. The amount of ..........(4)........ on our food also increases. Doctors and dentists now know that sugar is the chief ......(5)....... of tooth decay. Eskimos' .....(6)......... , for example, started to decay when they began to .......(7)......... sweeter food.
Long ago doctors didn't like to .........(8)......... people's teeth anh ..........(9)......... them out when they decayed. Some people .....(10)........... toothache was a punishment from the Gods