【題目】—What's _______most useful invention in the 20th century?
—________computer, I think.
A.the; A
B.a; A
C.the; The
D./; The

【答案】C
【解析】句意:—20世紀(jì)最有用的發(fā)明是什么?—我想是電腦。A是不定冠詞,表示泛指一個;the是定冠詞,表示特指。第一個空后是形容詞的最高級形式,常跟定冠詞the;第二個空the computer表示發(fā)明物,也應(yīng)用定冠詞the。選C。

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