So poorly educated and trained are many young recruits to the United States work force that many business executives fear this country will lose its economic preeminence.
One reason why more young people lose their virginity during the summer than at other times of the year undoubtedly is because school vacations give adolescents more free time. (A) One reason why more young people lose their virginity during the summer than at other times of the year undoubtedly is because (B) If young people lose their virginity more during the summer than other seasons, it is undoubtedly because (C) One undoubtable reason that young people lose their virginity more during the summer than other times is (D) One reason more young people lose their virginity during the summer than at other times of the year is undoubtedly that (E) Young people lose their virginity more often during the summer undoubtedly because, for one reason,
A,C,E 肯定错, 我选 B ,因为我觉得D 不对, one reason 后面不要加 that 吗 ,one reason 在后面可是不做任何成分啊 就像 a time 后 加 when 一样,需要 加 when 的啊 ,如果加why 就对了,但是不加也对吗 ?
i'm confused with the lack of conjunction "why" behind "one reason" . I exactly know that the choices A&B&C&E are false. who can give some instruction? or the editor of the file missed the word, just for a slip of pen? Many thanks.