After _______ absence of 10 years from his hometown, Mr. Li doesn't know _______ great changes have taken place there.?
A．an;/B．an; theC．the; aD．/;the?
A　
考查冠詞。句意為“在離鄉(xiāng)10年后,李先生不知道他的家鄉(xiāng)已經發(fā)生了巨大的變化”。
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