---What do you think of ________ lecture given by Professor Thomas?---Great. I quite agree to his idea that every one can make ______ difference to society.A.the, aB.a, aC.the, theD.a, the
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A解析试题分析：这题考查冠词，第一空填the，特指Thomas教授做的演讲，第二空填a，考查固定短语：make a difference“有影响，有差别”。选A。
考点：考查冠词的用法
点评：对于冠词的构成要从特指还是泛指入手，定冠词表示特指，不定冠词表示泛指。还要注意固定搭配。