—Who listens Eric Brad or Rick?—Of course Brad.A. the most carefullyB. more carefullyC

问题补充：

—Who listens , Eric , Brad or Rick?

—Of course Brad.

A. the most carefully

B. more carefully

C. the most careful

D. more careful

答案：

(答案→)A. the most carefully

B. more carefully

C. the most careful

D. more careful

解析：本句中listen是行为动词“听”的意思，后面接副词做状语，联系下文Eric , Brad or Rick可知是表示在多个中进行比较，故用副词的最高级。故选A。