—He is the only one of the students from the country in my class, and we have known for qu

—He is the only one of the students from the country in my class, and we have known for quite some time.
—Where did you meet for the first time?
—It was on the farm I used to work.
A. who are; that
B. who is; where
C. that is; that
D. whom are; on which

A. who are; that(答案→)B. who is; whereC. that is; thatD. whom are; on which解析：第一空先行词为“one”(因为有“the only”修饰)，故定语从句中连系动词用“is”；第二空尽管去掉“It was”和空格句子仍然除了，但是根据上文所问“你是第一次在哪儿认识他的”，断定不是对地点进行强调句，故不是强调句型。结合答语中的“farm”是先行词，“work”是不及物动词，故用关系副词“where”。句意：“他是我们班唯一一位来自那个国家的学生。我们已经认识相当一段时间了。”“你是第一次在哪儿认识他的？”“是在我过去工作的农场上认识他的。”

感谢回答，我学习了