The
earth is our home. We must take care of it. That is to say we must keep the
land, air and ___1___ clean.
But
man has begun to pollute(污染)the earth ___2___ he first made a fire, washed his clothes in the
river and threw dirty things ___3____. Many years ago, pollution was not so
serious because there were not ___4___ many people. There was enough clean air,
land and water. When the land or the river was dirty in one place, man ___5___
another place, But now man is slowly polluting the whole world and there is
___6___ enough clean air, nor clean land, nor clean water. More people, more
___7___.
When
is this all to ___8___? Is it possible to get rid of (消除) pollution? We are glad to say
that people have come to know the ___9___ of pollution and ___10___ them are
working hard to protect (保护) our earth.
( ) 1. A. river B.
sea C.
lake D.
water
( ) 2. A. before B.
while C.
since D.
when
( ) 3. A. on the
ground B. into the
air C.
into space D.
near the buildings
( ) 4. A. such B.
so C.
too D.
as
( ) 5. A. lived B.
flew to C.
left to D.
moved to
( ) 6. A. no B. neither C.
either D. not any
( ) 7. A. luck B.
clean places C.
pollution D.
dirty cities
( ) 8. A. end B.
start C.
over D.
develop
( ) 9. A. dangerous B.
importance C.
danger D.
use
10.( ) A. much of B.
a lot C.
the large number of D. a large number of
