The complete subject of the following sentence is and the simple subject is
This old radio works very well.

The complete subject of the following sentence is __old radio

the simple subject is _radio

Explanation:

old is the modifier

A simple subject is the main word or words in a subject. It does not include any of the modifiers that might describe the subject. To identify the simple subject in a sentence, ask yourself who or what performs the action in the sentence. Remember, though, that a simple subject is very basic.

d. pushing his plate away from the edge of the table idk what the other guy was trying to

do you want me to proof read it?