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runs through mountains and valleys. It forms lakes and oceans. Water is
everywhere.
Nature has a great water system. Rainwater finds its way to streams and
rivers. Rivers lead to the ocean. At mouths of rivers, fresh water joins the salt
water of the ocean.
Thick water steam in the air becomes clouds and clouds bring us rain. Plans
and animal's life depends on water. Where there is water, there is life. We have
to clean our streams and rivers and do something against pollution because
pollution does harm to the life.
B. water can run everywhere
C. there are living things in the water
D. where there is water, there is life
B. Water is everything.
C. Water forms everything.
D. Water runs through everything.
B. in the mountains
C. at mouths of rivers
D. at mouths of oceans
B. Stop air pollution.
C. Prevent the fresh water from joining the salt water.
D. Clean our streams and rivers.
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