I've had that issue with other words - usually I just go with the first or the simplest translation : )
"Ils marchent rapidement" Isn't this correct? My understanding is that the singular and plural forms sound the same.
It should be marked as right, since there is no pronunciation difference, and no context.
First thing that came to my mind reading this sentence was the vampires of Twilight Saga
I tried that, but it was not accepted. I do not understand why not, but I would appreciate knowing why it is not correct.