问题补充:
. 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
答案:
(答案→)A. some of whom
B. some of them
C. most of whom
D. who
解析:考查定语从句。句中先行词为students,在从句中作some of的宾语,故用关系词whom。句意:我已经教过几百位学生,其中一些已经在他们领域工作多年了。
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