________ much is known about the surface of Mars, what happened during a long time remains unknown.


  1. A.
    For
  2. B.
    While
  3. C.
    Since
  4. D.
    Because

The student left the room ________ all the lights on.


  1. A.
    with
  2. B.
    and
  3. C.
    but
  4. D.
    when

Pollution should be stopped ________ the environment.


  1. A.
    protecting
  2. B.
    from protecting
  3. C.
    to protecting
  4. D.
    to protect

My husband and I ________ about money matters all the time, but now things are different．


  1. A.
    are quarreling
  2. B.
    were quarreling
  3. C.
    have been quarreling
  4. D.
    had been quarreling

I ________ a computer program last night, and I thought that I could finish it this week．


  1. A.
    composed
  2. B.
    was composing
  3. C.
    had composed
  4. D.
    had been composing

He asked me what ________ in China in reeent years?


  1. A.
    is going on
  2. B.
    was going on
  3. C.
    has been going on
  4. D.
    had been going on

A healthy person is usually full of ________ after he gets up in the morning．


  1. A.
    strength
  2. B.
    force
  3. C.
    energy
  4. D.
    power

Our plan is to produce an advertisement ________ the famous computer which is supplied ________ one of China's biggest computer producers .


  1. A.
    to; to
  2. B.
    for; by
  3. C.
    with; in
  4. D.
    at; at

A good advertisement should ________ the people's attention .


  1. A.
    get
  2. B.
    attract
  3. C.
    gather
  4. D.
    pay

Balloons and light aeroplanes can be used to pull huge signs as they fly slowly ________ a city.


  1. A.
    to
  2. B.
    above
  3. C.
    over
  4. D.
    near
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