I care about most is whether the company provides opportunities for further education.A. W

问题补充：

I care about most is whether the company provides opportunities for further education.

A. Whether

B. What

C. That

D. Which

答案：

A. Whether

(答案→)B. What

C. That

D. Which

解析：考查宾语从句的连接词：句意：我最关心的是是否公司会提供深造的机会。主语从句中缺少宾语，用what连接，whether是否，which哪个，不符合句意，that连接主语从句，在从句中不做成分，只是起到连接的作用，选B。