They finally managed to climb to the top,but __then.
This is one of the best films _______.
According to a recent U.S. report, children spent up to 25 hours a week _______ TV.
Mother gave me 2000 Yuan, most of _______used for my school fees.
All flights___ because of the snowstorm, we decided to take the train.
The reason ___ he can’t come is ______ he has to work late.