问题
选择题
Julie was good at German, French and Russian, all of _____ she spoke fluently.
A．who
B．whom
C．which
D．that
答案
答案：C
考查定语从句。因为中间是逗号，说明后面是一个从句，而介词后面不能用that和who，故排除A、D；又因为先行词为物，故用which。
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