(2013·合肥一中二模)I don't know who invented iphone,but I think it is useful invention.A. the;

发布时间:2020-08-17 09:20:34

(2013·合肥一中二模)I don't know who invented      iphone,but I think it is      useful invention.
A. the;a
B. the;the
C. an;the
D. an;a

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(答案→)A. the;a
B. the;the
C. an;the
D. an;a
解析:句意:我不知道是谁发明了iphone,但是我认为它是一个有用的发明。前一空是类指,用定冠词;后一个空格是泛指,表示“一个,一种”。
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