The bus was crowded with passengers going home from market, most of carrying heavy bags and baskets full of fruit and vegetables they had bought there.
A. whom
B. them
C. who
D. Which
网友回答
A. whom
(答案→)B. them
C. who
D. Which
解析：此题考察独立主格结构。逗号后面的部分无谓语，要填的部分是非谓语结构 “carrying…”的逻辑主语的一部分。