问题补充：
--What do you think of Lady Gaga?
--Maybe she is one of singers in the world.
A. popular
B. more popular
C. most popular
D. the most popular
答案：
A. popular
B. more popular
C. most popular
(答案→)D. the most popular
解析：句意：你认为嘎嘎小姐怎么样？——可能他是世界上最流行的歌手之一。联系上下文可知本句是在多个中尽心比较，故用形容词最高级，形容词最高级前面的定冠词一般不能省略，故选D。
