Very few people could understand the lecture the professor delivered because its subject was very ________.

A．obscure

B．indefinite

C．dubious

D．intriguing

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1 Questionsare based on the following passage.　　Some futurologists have assumed that the vast upsurge （剧增） of women in the workforce may portend a rejection of marriage. Many women, according to this hypothesis, would rather work than marry. The converse （反面） of this concern is that the prospects of becoming a multi-paycheck household could encourage marriages. In the past, only the earnings and financial prospects of the man counted in the marriage decision. Now, however, the earning ability of a woman can make her more attractive as a marriage partner. Data show that economic downturns tend to postpone marriage because the parties cannot afford to establish a family or are concerned about rainy days ahead. As the economy rebounds, the number of marriages also rises.
　　Coincident with the increase in women working outside the home is the increase in divorce rates. Yet, it may be wrong to jump to any simple cause-and-effect conclusions. The impact of a wife’s work on divorce is no less cloudy than its impact on marriage decisions. The realization that she can be a good provider may increase the chances that a working wife will choose divorce over an unsatisfactory marriage. But the reverse is equally plausible. Tensions grounded in financial problems often play a key role in ending a marriage. Given high unemployment, inflationary problems, and slow growth in real earnings, a working wife can increase household income and relieve some of these pressing financial burdens. By raising a family’s standard of living, a working wife may strengthen her family’s financial and emotional stability.
　　Psychological factors also should be considered. For example, a wife blocked from a career outside the home may feel caged in the house. She may view her only choice as seeking a divorce.
　　On the other hand, if she can find fulfillment through work outside the home, work and marriage can go together to create a stronger and more stable union.
　　Also, a major part of women’s inequality in marriage has been due to the fact that, in most cases, men have remained the main breadwinners. With higher earning capacity and status occupations outside of the home comes the capacity to exercise power within the family. A working wife may rob a husband of being the master of the house. Depending upon how the couple reacts to these new conditions, it could create a stronger equal partnership or it could create new insecurities.The word “portend” （Line 2, Para. 1） is closest in meaning to “________”.

A．defy

B．signal

C．suffer from

D．result from

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2 Diamonds have little ________ value and their price depends almost entirely on their scarcity.

A．intrinsic

B．eternal

C．subtle

D．inherent

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3 Doctors are interested in using lasers as a surgical tool in operations on people who are ________ to heart attack.

A．infectious

B．disposed

C．accessible

D．prone

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