I know you're telling the truth so I'll back you ----- on that. Yhe approprate preposition in the gap will be-
I know you're telling the truth so I'll back you ----- on that. Yhe approprate preposition in the gap will be- Correct Answer up
I know you're telling the truth so I'll back you ----- on that. Yhe approprate preposition in the gap will be- Correct Answer up