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.
Seeking to decrease the incidence of tooth decay, the American Dental Association is to spend $45 million over the next seven years promoting good dental hygiene.（）
A. the American Dental Association is to spend $45 million over the next seven years promoting good dental hygiene
B. the American Dental Association will spend $45 million over the next seven years to promote good dental hygiene
C. over the next seven years the American Dental Association is to spend $45 million promoting good dental hygiene
D. good dental hygiene will be promoted by the American Dental Association, which is spending $45 million over the next seven years
E. $45 million will be spent by the American Dental Association over the next seven years on the promotion of good dental hygiene
参考答案：B
解析：
"the American Dental Association" is the subject of the introductory phrase "Seeking to decrease the incidence of tooth decay," so it should come immediately after that phrase; C, D, and E incorrectly place other phrases between the introductory phrase and its subject. D and E also unnecessarily use passive verb constructions. The construction "is to spend.., promoting" in A is less idiomatic and forceful than "will spend.., to promote" in B, because, in general, use of a declarative active verb is more forceful than use of a "to be" verb, and infinitives are generally more forceful than gerunds. B is the best answer.