Air pollution is ________ kind of pollution.


  1. A.
    the seriousest
  2. B.
    seriously
  3. C.
    the most serious
  4. D.
    most seriously

When the land or the river was dirty in ________ place, man moved to ________ place.


  1. A.
    one, the other
  2. B.
    one, the others
  3. C.
    some, others
  4. D.
    one, another

It's possible for us to ________ pollution.


  1. A.
    get on
  2. B.
    get out of
  3. C.
    get off
  4. D.
    get into

A large number of people ________ hard to keep our country clean.


  1. A.
    are working
  2. B.
    were working
  3. C.
    has worked
  4. D.
    is working

He studies hard ________ catch up with others.


  1. A.
    as so to
  2. B.
    to as so
  3. C.
    so to as
  4. D.
    so as to

Did the big factory ________ dirty smoke into the air?


  1. A.
    let out of
  2. B.
    let into
  3. C.
    let out
  4. D.
    let off

________ people take part in the sports.


  1. A.
    Many and many
  2. B.
    More and more
  3. C.
    Much and much
  4. D.
    Less and less

Have you visited the bridge ________ the workers have just finished building ________?


  1. A.
    /…/
  2. B.
    where…it
  3. C.
    where…/
  4. D.
    /…it

The man ________ has gone to Beijing．


  1. A.
    whom I told you
  2. B.
    which I told you
  3. C.
    whom I told you about him
  4. D.
    I told you about

Is it in this house ________ he was born?


  1. A.
    which
  2. B.
    where
  3. C.
    that
  4. D.
    in which
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