Directions: Phrases in the sentences given below are underlined. Choose the option which you feel can replace all the underlined phrases. If there is no improvement needed, please click on ‘No improvement required’.

His theory seems, at first, to be plausible, but the facts in his research don’t put up.

Watson claimed he was at home at the time of the murder, but police said his story didn't break up.

His story just doesn't put down.