Not until all the fish died in the lake __________ how serious the pollution was.
It was unbelievable that the fans waited outside the gym for three hours just ____ a look at the sports stars.
____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.
_____ to sunlight for too much time will do harm to one's skin.
He got well-prepared for the job interview, for he couldn’t risk ____ the good opportunity.
Though _______money, his parents managed to send him to university.