单选题
"They said what we always knew," said an administration source, ______.
A、
he asked not to be named
B、
who asked not to be named
C、
who asked not be named
D、
who asked not named
【正确答案】
B
【答案解析】
who引导定语从句，修饰administration source。ask sb．not to do是固定结构。asked not to be named要求不具名。
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