52. Mary is ___D___ hardworking than her sister, but she failed in the exam.A. no soB. no moreC. not lessD. no less解析:no less + adj. than … =as … as…, 意思为:和…… 一样……句意:Mary和她妹妹一样学习很勤奋,可她考试并没有及格。no more … than …意思为:和…… 一样不……Mary is no more hardworking than her sister. 句意:Mary 和她妹妹一样学习不勤奋。