Bob’s salary is three times , so John admires Bob very much.A. as high as that of JohnB. a

Bob’s salary is three times , so John admires Bob very much.
A. as high as that of John
B. as bigger as that of John
C. as high as John
D. as much as John

(答案→)A. as high as that of JohnB. as bigger as that of JohnC. as high as JohnD. as much as John解析：考查倍数的表达;倍数+as+adj+as，句意是：鲍勃的工资是约翰的三倍，因此约翰非常羡慕鲍勃。应该是鲍勃的工资和约翰的工资比较，用that代替salary。选A。

这个解释是对的