问题
选择题
We learned a lot from her father, an engineer ___ does research ___ science.
A．that; into
B．whom; on
C．who; into
D．which ; on
答案
答案：C
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We learned a lot from her father, an engineer ___ does research ___ science.
A．that; into
B．whom; on
C．who; into
D．which ; on
答案：C