Jack is boy in my class.A. tallerB. the tallerC. as tall asD. the tallest

问题补充：

Jack is boy in my class.

A. taller

B. the taller

C. as tall as

D. the tallest

答案：

A. taller

B. the taller

C. as tall as

(答案→)D. the tallest

解析：在班级的范围是三个以上，表示此概念通常用最高级，最高级通常在单词后加est，

故选D。