(1)Now people in growing numbers are beginning to believe that some certain sports contribute directly to our health by giving us some physical exercises.
(2)-As a matter of fact, travel has become part of our life. This situation is encouraging, for it not only broadens people''''s minds to the extend which may not be reached previously, but also relaxes them physically, which help people work out mental problems more actively.
(3) Pollution poses a great threat to our existence.
n Some of the…are poisonous and dangerous to health.
(4)Environmental experts point out that increasing pollution not only causes serious problems such as global warming but also could threaten to end human life on our planet.
(5)…Under considerable pressure from… therefore…will only add to their burden.
(6) I see three kinds of pressure working on people today: pressure from education, family and career. It is easy to blame the school for charging too much money, the family members for the heavy burden, the society for the fierce competition. I think people should relax. It is important for them to keep a good mood under whatever circumstances.