Black holes ________ not be seen directly，so determining the number of them is a tough task．


  1. A.
    can
  2. B.
    will write
  3. C.
    must
  4. D.
    need

This maths problem is hard ________ .


  1. A.
    to work out
  2. B.
    to be worked out
  3. C.
    working out
  4. D.
    worked out

The huge box is too heavy for me ________ .


  1. A.
    to lift
  2. B.
    to be lifted
  3. C.
    lifting
  4. D.
    lifted

________ is the distance between the two cities?


  1. A.
    What
  2. B.
    How
  3. C.
    How far
  4. D.
    How much

They changed their blue skins ________ white ones.


  1. A.
    from
  2. B.
    with
  3. C.
    into
  4. D.
    for

Peter, you must learn to ________ others, or nobody would like to make friends with you.


  1. A.
    care for
  2. B.
    look for
  3. C.
    send for
  4. D.
    watch out for

The cell phone is a ________ of communication device （手段）and it is becoming more and more popular.


  1. A.
    sort
  2. B.
    kind
  3. C.
    style
  4. D.
    way

Have a good rest. You need to ________ your energy for the football match this afternoon.


  1. A.
    earn
  2. B.
    save
  3. C.
    hold
  4. D.
    get

Your football team ________ours last Sunday , but we ________the game yesterday afternoon.


  1. A.
    beat; won
  2. B.
    beat; beat
  3. C.
    won; beat
  4. D.
    won; won

________ Zhang Nan was elected ________made us very happy.


  1. A.
    That; a monitor
  2. B.
    What, monitor
  3. C.
    That; monitor
  4. D.
    不填; monitor
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