He turns a deaf ear to his parents many times they have pointed out his weakness.A. what

问题补充：

He turns a deaf ear to his parents, many times they have pointed out his weakness.

A. whatever

B. whichever

C. whenever

D. however

答案：

A. whatever

B. whichever

C. whenever

(答案→)D. however

解析：考查状语从句。However无论怎么，句意：他对他父母充耳不闻，无论他们指出他们缺点多少次。