25. The author concludes the passage with the advice that ________.
(A) the benefit of daily multivitamin intake outweighs that of exercise and a balanced diet
(B) it’s risky to take multivitamins without knowing their specific function
(C) the potential benefit of multivitamins can never be overestimated
(D) it’s reasonable to take a rational dose of multivitamins daily

21. At one time doctors discouraged taking multivitamins because they believed that multivitamins ________. (A) could not easily be absorbed by the human body (B) were potentially harmful to people’s health (C) were too expensive for daily consumption (D) could not provide any cure for vitamin deficiencies

22. According to the author, clinical trials of vitamin supplements ________. (A) often result in misleading conclusions (B) take time and will not produce conclusive results (C) should be conducted by scientists on a larger scale (D) appear to be a sheer waste of time and resources

23. It has been found that vitamin E ________. (A) should be taken by patients regularly and persistently (B) can effectively reduce the recurrence of heart disease (C) has a preventive but not curative effect on heart disease (D) should be given to patients with heart disease as early as possible

24. It can be seen that large doses of multivitamins ________. (A) may bring about serious side effects (B) may help prevent excessive bleeding (C) are likely to induce the blockage of arteries (D) are advisable for those with vitamin deficiencies

26. The word “portend” (Line 2, Para. 1) is closest in meaning to “________”. (A) defy (B) signal (C) suffer from (D) result from

27. It is said in the passage that when the economy slides, ________. (A) men would choose working women as their marriage partners (B) more women would get married to seek financial security (C) even working women would worry about their marriages (D) more people would prefer to remain single for the time being

28. If women find fulfillment through work outside the home, ________. (A) they are more likely to dominate their marriage partners (B) their husbands are expected to do more housework (C) their marriage ties can be strengthened (D) they tend to put their career before marriage

29. One reason why women with no career may seek a divorce is that ________. (A) they feel that they have been robbed of their freedom (B) they are afraid of being bossed around by their husbands (C) they feel that their partners fail to live up to their expectations (D) they tend to suspect their husbands’ loyalty to their marriage

30. Which of the following statements can best summarize the author’s view in the passage? (A) The stability of marriage and the divorce rate may reflect the economic situation of the country. (B) Even when economically independent, most women have to struggle for real equality in marriage. (C) In order to secure their marriage women should work outside the home and remain independent. (D) The impact of the growing female workforce on marriage varies from case to case.

31. The traditional view of “human nature” was strongly challenged by ________. (A) the emergence of the evolutionary theory (B) the historical approach to man (C) new insight into human behavior (D) the philosophical analysis of slavery