Tom is an aggressive but easygoing person will succeed whatever career he chooses.A. the

问题补充：

Tom is an aggressive but easygoing person, will succeed whatever career he chooses.

A. the one who

B. one who

C. the one

D. one

答案：

A. the one who

(答案→)B. one who

C. the one

D. one

解析：考查代词和定语从句。 One代替a person,在此起了强调作用。又由于定语从句缺少主语，故关系代词who不能省略。