this bike is ______,if not better than,that one

题目

this bike is ______,if not better than,that one
A as good as
B so good as
C better than
D as good
我认为选D

答案

绝对选A,if not better than在句中是插入语,其典型标志是用两个逗号隔开,起补充说明作用.完整的句子应该是this bike is as good as that one.