单选题 Betty said that______all her friends,Mary was her favorite.
[A] between [B] of [C] in

【正确答案】 B
【答案解析】[精析] 本题考查的是介词辨析。between通常表示两者之间,in表示具体的范围或地点,of结构可以表示比较级范围,故B正确。