21. The robber was brought to the judge， _     _.

    A. his hands were tied fast       B. his hands to be tied fast

    C. his hands having been tied fast        D. his hands tied fast

    22. _     _， he had to ask three people before he got there.

    A. Not knowing where was the bookstore

    B. Knowing not where the bookstore was

    C. Not knowing where the bookstore was

    D. Not to know where the bookstore was

    23. _     _， they went swimming.

    A. Being a hot day      B. It was a hot day    C. Due to a hot day   D. The day being hot

    24. "There is something wrong with the table." "Yes， I can_     _.

    A. feel it that its moving     B. feel it moves

    C. feel it moving            D. feel it to move

    25. I really appreciate_     _ to help me， but I am sure that I can manage by myself.

    A. you to offer          B. that you offer

    C. your offering         D. that you are offering

    26. Rather than _     _everything to the last minute， he always prefers to start early.

    A. to leave    B. leaving   C. leave   D. having left

    27. "Did you have trouble with your car this morning？"

    "Yes， but I finally managed _     _"

    A. to get starting it     B. getting started it

    C. to get it started     D. it to get started

    28. The riot is said _     _by the government's negligence of the people's welfare.

    A. to have been caused   B. being caused   C. to be caused     D. to cause

    29. Some things are known _     _ when they unite with the oxygen of the air.

    A. to burn      B. to be burning    C. to have burnt      D. to be burnt

    30. Without facts， we can not form a worthwhile opinion for we need to have factual

    knowledge _     _our thinking.

    A. which to be based on     B. on which to be based

    C. which to base on         D. upon which to base

    DCDCC CCAAD