Some scientists think there are _______ 2,000 million flashes of lightning per year.
.Nobody knew when the fire ________, but they knew it ________ the next morning.
My mother opened the drawer to _______ the knives and spoons.
He offered the information the police needed and deserved _______.
It was playing computer games_______ cost the boy plenty of time______ he ought to have spent doing his homework.
First impressions are the most lasting. After all, you never get ______ second chance to make _______ first impression.