________ scores of times, but Derek still couldn't understand how to use past participle in a concrete situation．


  1. A.
    Having explained
  2. B.
    Having been explained
  3. C.
    Though it was explained
  4. D.
    It was explained

If we can ________ our present difficulties, then everything should be all right.


  1. A.
    come across
  2. B.
    get over
  3. C.
    come over
  4. D.
    get off

Stella was disappointed to find her new plan ______and fell into great depression.


  1. A.
    put away
  2. B.
    carried out
  3. C.
    turned down
  4. D.
    left out

The number of the students of the university ____ more than 50,000.


  1. A.
    get
  2. B.
    gets
  3. C.
    reach
  4. D.
    reaches

His face went red ________ the teacher had said.


  1. A.
    because of what
  2. B.
    because that
  3. C.
    because what
  4. D.
    because

We'll never forget ________ the other day.


  1. A.
    that we have been warned
  2. B.
    what we were warned
  3. C.
    what we were warned of
  4. D.
    what we had been warned of

If ________,water can be changed into steam.


  1. A.
    heated
  2. B.
    heating
  3. C.
    been heated
  4. D.
    having been heated

Sorry, I can't pay you, for I haven't any ________ me.


  1. A.
    changes on
  2. B.
    change in
  3. C.
    changes with
  4. D.
    change about

That he caught a lion all by himself was ________ to people.


  1. A.
    surprised
  2. B.
    surprise
  3. C.
    a surprise
  4. D.
    surprising

________ is known to us all, this law refers to everyone.


  1. A.
    It
  2. B.
    As
  3. C.
    The fact that
  4. D.
    What
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