The main use of studying history, expressed in the passage, is that it enables us to discover the reasons underlying present events
people can get knowledge about their ancestors, from whom they descended
decision makers can plan the future by taking past events as examples
people can draw lessons from past events so as not to make the same mistakes
it can help solve the problems of modern society
The writer warns that when applying to the past for the solution of present or future events one has to be careful to choose events in the past which are very similar to the present situation
one should have a good knowledge of both past and present
one has to pay special attention to whether the sample event is in the distant or the near past
one shouldn't ignore the essential changes in society over the years
the differences between the interpretations of various historians should be taken into consideration
According to the passage, there is an agreement in the community that the study of history should be given more importance in school syllabi
history departments in universities are satisfactory in terms of number of students
future events can't be predicted on the basis of very fragmentary historical information
the events in our modern world can't be compared with those in the past
a complete education can only be achieved by the study of history
123 HOW TO BRUSH YOUR TEETH Most of us feel quite satisfied with the amount of care we show to our teeth merely by brushing them frequently enough. However, we don't realize the damage we give to our teeth if we don't know the proper way of brushing. Experts state that the way we brush our teeth has a great influence on our dental health.
In Finland, for instance, the Academy of General Dentistry has warned against wielding your toothbrush in what it called the "death-grip" - that is, clenching the brush in the palm and scrubbing your teeth vigorously. Such overzealous cleaning can cause the gums to recede and damage the exposed roots of the teeth.
Researchers in Finland studied one brushing technique that can help you exert less pressure: grip the brush as you would a pen - between your thumb and first two fingers. Done correctly, this method can cause less damage to the gums and clean as effectively as the standard grip. Select a brush with soft bristles and use short, gentle, circular strokes.
