If there is no answer at the front door, ________at the back door.


  1. A.
    try to knock
  2. B.
    trying to knock
  3. C.
    try knocking
  4. D.
    trying knocking

You _______enter the lab without the teacher's ________.


  1. A.
    can't; permit
  2. B.
    don't; permission
  3. C.
    can't; permission
  4. D.
    mustn't; permition

As Susan stared at _________ piles of plastic in her recycling bin, _________ strong sense of responsibility made her stick to her recycling work．


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

The building looks beautiful with green trees on ________ sides of it.


  1. A.
    both
  2. B.
    either
  3. C.
    every
  4. D.
    all

________ feeling very tired because of riding his bike to work everyday, my father refused to buy a motorbike when he thought about such a high price．


  1. A.
    Due to
  2. B.
    In spite of
  3. C.
    Although
  4. D.
    As a result

Steven Hawking’s conclusion about the Black Hole is a little ________, but it has been accepted by most of the world．


  1. A.
    realistic
  2. B.
    abstract
  3. C.
    contemporary
  4. D.
    appropriate

Seldom ________ out time to watch TV on Sunday．


  1. A.
    I can squeeze
  2. B.
    can I squeeze
  3. C.
    squeeze I
  4. D.
    I squeeze

He came to my office ________, but I couldn’t see him, as I was engaged．


  1. A.
    in a moment
  2. B.
    at the moment
  3. C.
    for the moment
  4. D.
    at one moment

To our surprise, the well dressed young lady ________ to be a thief．


  1. A.
    found out
  2. B.
    burst out
  3. C.
    put out
  4. D.
    turned out

The little girl ________ her hand for the bottle on the shelf but it was out of her reach．


  1. A.
    held on
  2. B.
    held to
  3. C.
    held out
  4. D.
    held on to
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