Now good many old people are also fond of playing games on internet.A. the; 不填B. a; theC

问题补充：

Now good many old people are also fond of playing games on internet.

A. the; 不填

B. a; the

C. the; the

D. a; 不填

答案：

A. the; 不填

(答案→)B. a; the

C. the; the

D. a; 不填

解析：考查冠词。A good many，许多，大量，是固定短语，所以第一空用a；第二空特指网络，internet前通常用the修饰。所以选B。