The girls in the photograph are twins is my classmate in high school.A. the taller of them

问题补充：

The girls in the photograph are twins,is my classmate in high school.

A. the taller of them.

B. the taller of whom.

C. the tallest of that

D. the tallest of who

答案：

A. the taller of them.

(答案→)B. the taller of whom.

C. the tallest of that

D. the tallest of who

解析：这题考查定语从句：名词+of+关系代词，先行词是twins，所以是两个里面较高的那个。句意是：照片里的女孩是双胞胎，两个里面较高的那个是我们高中的同学。选B。