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科目： 來源： 題型：單選題

However,at times this balance in nature is _____,causing a number of possibly unforeseen effects.


  1. A.
    troubled
  2. B.
    puzzld
  3. C.
    disturbed
  4. D.
    destroyed

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科目： 來源： 題型：單選題

It's very dangerous to use those machines that _______.


  1. A.
    are repaired
  2. B.
    are being repaired
  3. C.
    is being repaired
  4. D.
    is repaired

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科目： 來源： 題型：單選題

The pupils _______ doing their exercises in the classroom now by their teacher.


  1. A.
    have kept busy
  2. B.
    are busy
  3. C.
    are keeping busy
  4. D.
    are being kept busy

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科目： 來源： 題型：單選題

He said yes _________ he was asked if he could possibly serve as a teacher in the remote area for two years．


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

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科目： 來源： 題型：單選題

We had to close the door to ________ the cold out of the house.


  1. A.
    prevent
  2. B.
    keep
  3. C.
    put
  4. D.
    break

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科目： 來源： 題型：單選題

Li Ming is ________ to ask for help from them.


  1. A.
    possible
  2. B.
    probable
  3. C.
    likely
  4. D.
    maybe

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科目： 來源： 題型：單選題

China has ________ a number of satellites into the sky.


  1. A.
    carried up
  2. B.
    sent up
  3. C.
    put up
  4. D.
    kept up

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科目： 來源： 題型：單選題

I intend ________ swimming this afternoon.


  1. A.
    to go
  2. B.
    going
  3. C.
    went
  4. D.
    to have gone

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科目： 來源： 題型：單選題

________ you get there, you must call me right away.


  1. A.
    If
  2. B.
    Once
  3. C.
    Because
  4. D.
    For

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科目： 來源： 題型：單選題

Since you have ________ a promise, you should never break it.


  1. A.
    kept
  2. B.
    made
  3. C.
    gave
  4. D.
    carry out

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