问题补充:
He is at least as tall as his brother, if not .
A. tall
B. taller
C. so tall
D. the taller
答案:
A. tall
(答案→)B. taller
C. so tall
D. the taller
解析:考查状语从句的省略。补充完整:He is at least as tall as his brother, if he is not taller than his brother .句意:他至少和他的弟弟一样高,如果不是更高的话。选B.