问题
Mr. Green has two sons, and one of ______ is working as a bus driver now.
A:who
B:whom
C:them
D:Whose;
B:whom
C:them
D:Whose;
正确答案是：
同类题型
Why are the lights in the teachers’ office still on—There ________ be some teachers working there.
_________ the people lost their lives in thetraffic accident.
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Who’s that young man on the poster— Jerry Smith, _____ European business man.