2. 外语
  3. The distinguished professor was invited to preside ______ the conference on behalf of the chairman.

The distinguished professor was invited to preside ______ the conference on behalf of the chairman.

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问题 The distinguished professor was invited to preside ______ the conference on behalf of the chairman.
选项 A、on
B、in
C、over
D、for
答案C
解析 这里考的是词组搭配。动词词组preside over/at：be the president of the meeting，chair(v.)主持会议。
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