—I ______ for you for two hours, but in vain. Where did you go? —I ______ at my uncle’s.
_____ with the accident, he was forced to resign.
They use computers to keep the traffic smoothly.
All flights ________called off because of the terrible weather, they had to go there by train.
After the six-party talk in Beijing, an agreement was reached _________ that North Korea would abandon _________ nuclear weapons.
He never dreamt of _____for him to be sent abroad very soon.