Thanks to invention of the Internet people can stay at home chatting with friends onlin

问题补充：

Thanks to invention of the Internet, people can stay at home chatting with friends online.

A. the；the

B. 不填；the

C. the；不填

D. 不填；不填

答案：

A. the；the

B. 不填；the

(答案→)C. the；不填

D. 不填；不填

解析：考查冠词。笫一空，“因特网的发明”是特指概念，故前面加定冠词the；第二空，friends是复数，泛指朋友，故前面不加冠词。