The invention of paper was a great contribution tohuman civilization.A. a;aB. the;theC. /;

发布时间：2020-08-15 00:33:50

The invention of     paper was a great contribution to    human civilization.
A. a;a
B. the;the
C. /;/
D. the;/

网友回答

A. a;a
B. the;the
(答案→)C. /;/
D. the;/
解析：paper 物质名词，意为“纸”，前面不加冠词；human civilization “人类文明”，习惯上前面也不用冠词。
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