题目内容：
Directions: In this section there are 15 incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center.26. She is not the cheerful woman ____________.
A) what she used to be B) she used to be
C) who she used to be D) that she used to be
27. None of the servants were ____________ when Mr. Smith wanted to send a message.
A) available B) approachable
C) attainable D) applicable
28. He signed up for the course not only to earn more credits but also ___________ more about computer programming.
A) to learn B) learning
C) to have learned D) to be learning
29. We firmly ____________ the just struggles against terrorism.
A) follow up B) spring up
C) back up D) hold up
30. The meeting might ___________ for weeks since neither of the sides intends to compromise.
A) dwell on B) drag on
C) reflect on D) press on
31. His words _____________ in my attitude toward life.
A) take the place B) have a sense
C) come to an end D) make a difference
32. _____________ the fact that he just had a heart attack, Professor Thomas persisted in his research.
A) Because of B) As to
C) in spite of D) in view of
33. Corn originated in the New World and thus was not know in Europe until Columbus found it _____________
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