2014考研英语基础阶段：模拟试题及详解(四)
16. Talk to anyone in the drug industry, you’ll soon discover that the science of genetics is the biggest thing to hit drug research since penicillin was discovered.
[A] or [B] so [C] for [D] and
17. Had Paul received six more votes in the last election, he ________ our chairman now.
[A] must have been [B] would have been [C] were [D] would be
18. Stressful environments lead to unhealthy behaviors such as poor eating habits, which ________ increase the risk of heart disease.
[A] in turn [B] in return [C] by chance [D] by turns
19. The tourist is prevented from entering a country if he does not have ________ passport.
[A] an operative [B] a valid [C] an efficient [D] an effective
20. The project requires more labor than ________.
[A] has been put in [B] have been put in [C] being put in [D] to be put in
15. 正确答案为C项。本题考查不定式作主语的补足语，而且表示动作已经发生，应使用不定式的完成时。句子译文：“据当地报纸报道，昨天在光天化日之下该银行遭到抢劫。”
16. 正确答案为D项。祈使句表示条件，然后由and引出结果。句子译文：如果和医药行业的任何人交谈，你很快就会发现，基因科学是自青霉素发明以来对医药研究影响最大的东西。
17. 正确答案为D项。
18. 正确答案为A项。
19. 正确答案为B项。形容词operative表示“操作的，起作用的”;valid表示“有法律效力的”，如a valid contract具有法律效力的合同，a valid air ticket有效机票;efficient表示“有效率的”;effective表示“有效果的”。句子译文：如果没有有效的护照，游客就不能进入一个国家。
20. 正确答案为A项。
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