After watching______TV,she played_____violin for an hour.

The answer is B

because in this situation, "TV" and "Violin" has confirmed to her. It means she knew which of the "TV" and the "Violin" , so they need "the" ahead.

for example," I like "the" TV in that store"(I know which TV I m talking about, and I mean to it particularly)

otherwise, "I saw TV in that store"
( I dont mean any of TV particularly)

ps: "TV" means either the object or entertainments.it
depends on the sentence situation

hope this would helps!

d
如果是b，那就是特定的电视节目了；或着说，她在目不转睛地盯着那台电视，显然没有任何意义。
乐器前加the
为什么选b我也不懂！！！

个人觉得选D比较好
如果是B,那么就是特制某个电视节目吧

“TV”是两个单词的缩写，所以要加“the”。
“violin”是乐器，乐器前要加“the”。

我觉得选D才对,第一个不用THE的

D