The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.
These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.
To be a great salesman requires p personal skills, the ability to think fast, and demands a can-do attitude.（）
A. requires p personal skills, the ability to think fast, and demands
B. requires p personal skills, the ability to think fast, and
C. requires p personal skills, demands the ability to think fast, and
D. requiring p personal skill, an ability to think fast, and demands
E. demands p personal skills, an ability to think fast, but with
参考答案：B
解析：
To maintain parallel constructions, each item in the list of three must either be the object of the first verb or have its own verb; A, C, and D are incorrect on these grounds. D also doesn’t make sense. E is incorrect because it does not make sense to use "but with" to contrast the previous positive attributes with a complementary positive attribute. B is clear and grammatically correct.