_________ the meeting himself gave them a great deal of encouragement．
A.The president will attend
B.The president to attend
C.The president attended
D.The president’s attending
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D解析本题考查动名词复合结构作主语的用法。主语从句的连词不能省略，排除C项；A项缺少连词，且时态也不正确；B项为错误搭配。D项为动名词的复合结构，在句中作主语。动名词复合结构的构成为“名词/宾格代词+doing”或“名词所有格/形容词性物主代词+doing”。作主语时通常用后一种形式。