2. 外语
  3. They have been trying to find out the identity of the writer of the________letter, but in vain.

They have been trying to find out the identity of the writer of the________letter, but in vain.

admin2009-01-05  29
问题 They have been trying to find out the identity of the writer of the________letter, but in vain.
选项 A、infamous
B、autonomous
C、anonymous
D、unanimous
答案C
解析
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