问题补充:
—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:
A. the, A
B. a, A
(答案→)C. the, The
D. /, The
解析:考察冠词。最高级前面要加冠词,表示特指。下文指的是上文提到在20世纪最有用的发明,为特指,用定冠词。故选C。
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