Which of the sentences below uses the word turned as a linking verb?

Question

A)The milk turned sour after sitting out on the counter overnight.
B)She turned the doorknob but the door was locked.
C)Have you turned in your writing assignment yet?
My choice is A

Answer 1

Right.

Answer 2

TYVM

Answer 3

YVW

Answer 4

thx

Answer 5

Thanks guys