标题: OG SC No.46 ? [打印本页] 作者: tyou 时间: 2003-8-3 05:12 标题: OG SC No.46 ? the correct answer for No.46 is E, but is Do missing before or after `than`in this sentence ?
a study commissioned by the department of agriculture showed that if calves exercise and asociated with other calves, they will require less medication and gain weight quicker than do those raised in confinement.
E. associate with other calves, they require less medication adn gain weight more quickly than