八年級下冊 Unit 6 How long have you been collecting shells?教案
nature has a great water system(系統). rainwater finds its way to streams(溪) and rivers. rivers lead to the ocean. at mouths of rivers, fresh water joins the salt water of the cean.
thick water steam in the air becomes clouds and clouds bring us rain. plants 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(污染) because pollution does harm to the life.
1. we say water is the "life" of our earth because _______.
a. water is in the air
b. water can run everywhere
c. there are living things in the water
d. where there is water，there is life
2. which of the following is exactly the same as what the article says?
a.
b.
c.
d.
3. according to(按照) the article，which of the following is correct?
a. water is in every living thing.
b. water is everything.
c. water is salty.
d. water runs through everything.
4. according to the article，fresh water joins the salt water of the ocean ______.
a. in the valleys b. in the mountains
c. at mouths of rivers d. at mouths of oceans