单选题 Because they usually receive the same score on examinations, there is disagreement as to ______ is the better student.
【正确答案】 A
【答案解析】[解析] 句意:因为在考试中他们总得相同的分数,所以就他们俩谁是更好的学生有争议。宾语从句题。在本句中,“as to”之后的从句做其宾语,所以空处既引导后面的宾语从句又在从句中做主语(表示人),因此应用who。