2. 外语
  3. It is well known that teenage boys tend to do better(1)_____ math than girls, that male high school students are more likely tha

It is well known that teenage boys tend to do better(1)_____ math than girls, that male high school students are more likely tha

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问题     It is well known that teenage boys tend to do better(1)_____ math than girls, that male high school students are more likely than their female counterparts(2)_____ advanced math courses like calculus, that virtually all the great mathematicians (3)_____ men. Are women born with(4)_____ mathematical ability? Or does society’s sexism slow their progress? In 1980, two Johns Hopkins University researchers tried(5)_____ the eternal nature/ nurture debate. Julian Stanley and Camilla Benbow (6)_____ 10,000 talented seventh- and eighth-graders between 1972 and 1979. Using the Scholastic Aptitude Test, in which math questions(7)_____ to measure ability rather than knowledge, they discovered(8)_____ sex differences.(9)_____ the verbal abilities of the males and females(10)_____ differed,(11)_____ girls scored over 500(on a scale of 200 to 800)(12)_____ mathematical ability; at the 700 level, the ratio was 14 to 1. The conclusion: males have(13)_____ superior mathematical reasoning ability.
    Benbow and Stanley’s findings,(14)_____ were published in "Science", disturbed some men and (15)_____ women. Now there is(16)_____ for those people in a new study from the University of Chicago that suggests math(17)_____ not, after all, a natural male domain. Prof. Zalman Usiskin studied 1,366 tenth graders. They were selected from (18)_____ classes and tested on their ability to solve geometry proofs, a subject requiring(19)_____ abstract reasoning and spatial ability. The conclusion (20)_____ by Usiskin: there are no sex differences in math ability.
(3)
选项 A、might be
B、have been
C、must be
D、had been
答案B
解析 此处要表达的意思是“几乎所有伟大的数学家都是男性”，是强调对现在的影响．即男性比女性更有数学的天赋，因此用现在完成时。故选B。
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