If a bag is filled with books and pens,
题型:选择题
问题:
If a bag is filled with books and pens, it must belong to someone __________ works hard.[ ]
A. which
B. /
C. whom
D. who
If a bag is filled with books and pens, it must belong to someone __________ works hard.[ ]
A. which
B. /
C. whom
D. who