The correct answer is option (C):
somebody turned off
The original sentence is "Somebody turned to the radio." The underlined part is "turned to." We need to choose the best replacement from the given options.
Let's analyze the meaning of "turned to" in this context. When we "turn to" something, it often implies seeking it for help or assistance, like "She turned to her parents for support." In the context of a radio, "turned to" doesn't make much sense. You don't typically "turn to" a radio in the sense of seeking help from it.
Now let's examine the options:
Option 1: "somebody turned for" - This phrase is incomplete. "Turned for" needs an object to make sense, for example, "turned for help" or "turned for information." It doesn't fit with "the radio."
Option 2: "somebody tumed in" - The word "tumed" is misspelled; it should be "turned." Even if it were spelled correctly, "turned in" has several meanings, such as to submit something (turn in homework) or to report someone (turn in a criminal). Neither of these meanings applies to a radio.
Option 3: "somebody turned off" - This phrase means to stop something from operating, usually by pressing a switch. This is a very common action performed with a radio: someone might turn the radio off to stop the sound.
Option 4: "somebody turned of" - This is a misspelling of "turned off." It's not a grammatically correct phrase.
Considering the common actions associated with a radio, "turned off" is the most logical and grammatically correct phrase to replace "turned to." People frequently turn radios on or off. Therefore, "Somebody turned off the radio" is a sensible and well-formed sentence.
The correct answer is somebody turned off.