If everyone ________ how to deal with the pollution, the world ________ better.


  1. A.
    knows; will be
  2. B.
    had known; would be
  3. C.
    knew; would be
  4. D.
    would know; had been

He managed to escape from the burning building without ________.


  1. A.
    injuring
  2. B.
    injured
  3. C.
    been injured
  4. D.
    being injured

________ warm evenings the old man would sit in the yard.


  1. A.
    In
  2. B.
    On
  3. C.
    At
  4. D.
    During

Air is the mixture of gases in which ________ the gas is oxygen.


  1. A.
    not every of
  2. B.
    not all
  3. C.
    none of
  4. D.
    all of

The speaker talked about the full use that he ________ the spare time.


  1. A.
    made of
  2. B.
    made up
  3. C.
    took up
  4. D.
    took off

Class will be over ________.


  1. A.
    before long
  2. B.
    long before
  3. C.
    long after
  4. D.
    shortly after

Now I've been out of ________ work for weeks, I've joined the ranks of ________ unemployed．


  1. A.
    the; 不填
  2. B.
    the; the
  3. C.
    不填; the
  4. D.
    不填; an

Paper ________ fire easily. When it is ________ fire , you should cover it .


  1. A.
    on, caught
  2. B.
    is on , caught
  3. C.
    catches , on
  4. D.
    is caught , on

Mary was ________ the letter from Tom, but it didn’t reach her forsome reason.


  1. A.
    expecting
  2. B.
    waiting
  3. C.
    waiting for
  4. D.
    expected for

It was not until midnight that ________ the camping site．


  1. A.
    did they reach
  2. B.
    they had reached
  3. C.
    had they reach
  4. D.
    they reached
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