My brother is playingviolin while my sister is chatting on Internet.A. / theB. the theC. t

问题补充：

My brother is playingviolin while my sister is chatting on Internet.

A. / the

B. the the

C. the /

D. a the

答案：

A. / the

(答案→)B. the the

C. the /

D. a the

解析：playingviolin，弹小提琴，乐器前加the ；on Internet.在网上，是固定结构，加the。所以选B。