remain to be seen
To have not yet happened; to be as yet unknown.
It remains to be seen whether he will win the election.
ADJ.
active, anonymous, better, cheerful, cold, longer, longer, seated
She decided to remain anonymous throughout the investigation to protect her privacy.
VERB + REMAIN
continue, experience, fragments, prefer, want, weather
The old stone fragments remain scattered across the hillside after the storm.
REMAIN + NOUN
i'll, indoors, london, man, memory, mystery, participants
The cause of his death will remain a mystery for many years to come.
PREP.
in, until
The package remained in the warehouse for three weeks before delivery.
ADV.
always, probably
The old wooden bridge will probably remain standing for another decade.