2. 外语
  3. ______ to speak at the convention, Dr. Smith prepared some notes.

______ to speak at the convention, Dr. Smith prepared some notes.

admin2012-08-05  57
问题 ______ to speak at the convention, Dr. Smith prepared some notes.
选项 A、Being asked
B、Has been asked
C、Having been asked
D、Is asked
答案C
解析
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