If you want to do the experiment a second time, you'd better be more careful ________ you made a mistake．


  1. A.
    when
  2. B.
    in case
  3. C.
    where
  4. D.
    unless

_________ to go to Beijing by bus or by train．


  1. A.
    You are very convenient
  2. B.
    It is very convenient of you
  3. C.
    It is very convenient for you
  4. D.
    There are conveniences for you

The two rings are so ________ alike that it is difficult to tell one________ the other.


  1. A.
    very; to
  2. B.
    much; to
  3. C.
    much;from
  4. D.
    very;from

The box is very heavy but not clumsy．_________ the table．


  1. A.
    That is the same as
  2. B.
    It is the same with
  3. C.
    So it is with
  4. D.
    All of the above

The ground is wet, ________ it mined yesterday.


  1. A.
    because
  2. B.
    as
  3. C.
    since
  4. D.
    for

The little town has grown into a modern big city since 1978 and is _________ what it used to be．


  1. A.
    more than twice as big as
  2. B.
    twice more than as big as
  3. C.
    more than twice big than
  4. D.
    twice more than big than

Do you feel like ________ to the People's Park?


  1. A.
    walk
  2. B.
    to walk
  3. C.
    walking
  4. D.
    walked

She looked up his number in the phone book to make sure that she had ________.


  1. A.
    made it right
  2. B.
    found it right
  3. C.
    got it right
  4. D.
    took it right

Some people believe ________ is easier for small countries to become strong and rich than for large countries.


  1. A.
    this
  2. B.
    it
  3. C.
    that
  4. D.
    one

I don’t remember how many years ago ________ people began to grow crops．


  1. A.
    it was when
  2. B.
    was it that
  3. C.
    it was that
  4. D.
    was it when
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