. Fraud detectives are investigating the company, three of ______ senior executives have already been arrested. A. them B. who C. whom D. these 2. The police are investigating the company, three of ______ senior executives have already been arrested. A. what B. their C. which D. whose 这是我在网上看到的题，为什么第一题选择whom，第二题选择whose，诚心请帮我解答一下，谢谢。
