[单项选择]

Text 1
Mark Twain once observed that giving up smoking is easy. He knew, because he’d done it hundreds of times himself, Giving up for ever is a trifle more difficult, apparently, and it is well known that it is much more difficult for some people than for others. Why is this so
Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyse the smoking habits of twins. Her results suggest that an individual’s degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced.
The Netherlands Twin Register is a voluntary database that is prized by geneticists because they allow the comparison of identical twins (who
A. quitting smoking is no easy job.
B. kicking the habit of smoking demands a strong will.
C. some people are frustrated by failing to give up smoking.
D. some people may be destined to fail quitting smoking.

Text 1
Mark Twain once observed that giving up smoking is easy. He knew, because he’d done it hundreds of times himself, Giving up for ever is a trifle more difficult, apparently, and it is well known that it is much more difficult for some people than for others. Why is this so
Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyse the smoking habits of twins. Her results suggest that an individual’s degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced.
The Netherlands Twin Register is a voluntary database that is prized by geneticists because they allow the comparison of identical twins (who
A. it may have negative effects on related studies.
B. it is unreliable so far.
C. it may provide an excuse for nicotine addicts.
D. it could undermine the anti-smoking movement.

Text 2
Once free of Etruscan domination, the Romans developed a Republican form of government which lasted until the first century BC, and provided important continuity for Roman institutions. The motto "S. P. Q. R. "--Senatus Populusgue Romanus, "The Roman Senate and People" reflected the philosophy of the early Roman political and social order and remained the watchword of Roman society until Imperial times. It meant that sovereignty rested in the people themselves, and not in any particular governmental form. Yet in many ways the Roman Republic functioned as a democracy. Decisions affecting society were made at a series of assemblies which all citizens attended to express their will. The Senate, on the other hand, conducted the business of government including the passage of legislation and the supervision of elected magistrates. Over the centuries the greatest issues affecting Roman society were played out as dramas created by tensions betwe
A. It suggests that The Roman Senate was elected by the people and governed the people.
B. It suggests that The Roman Senate was the highest authority.
C. It suggests that it was the people, not government, who held the power and right of the country.
D. It suggest that the Roman Republic functioned a democracy the same as America.