. I have taught hundreds of students,___
题型:选择题
问题:
. I have taught hundreds of students,___________ having been working in their fields for years.
A.some of whom
B.some of them
C.most of whom
D.who
. I have taught hundreds of students,___________ having been working in their fields for years.
A.some of whom
B.some of them
C.most of whom
D.who