We havehurried all the way to the airport – the flight was called off because of thefoggy weather．

The man in black has two children, one of whom _______ in a foreign country.

is one of the greatest scientists, who won the Nobel Prize forphysics.

Do you know a spaceship flies at about nineteen kilometers ________ second

etter _________ when he is thinking, as heprefers to solve problems on his own.