问题补充：
Linda, the TV a little bit. I’m trying to read the book named The adventures of Tom Sawyer.
A. turn on
B. turn off
C. turn down
D. turn up
答案：
A. turn on
B. turn off
(答案→)C. turn down
D. turn up
解析：A. turn on 打开 B. turn off 关掉 C. turn down 调低 D. turn up调大；句意：琳达，把电视的声音调低一点。我正在试着读《汤姆历险记》这本书。故选C
