问题
选择题
The letter is from my sister, ______is working in Beijing.
A．which
B．that
C．whom
D．who
答案
答案：D
who引导非限制性定语从句,who作从句的主语.
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The letter is from my sister, ______is working in Beijing.
A．which
B．that
C．whom
D．who
答案：D
who引导非限制性定语从句,who作从句的主语.