_____ we got to the station, the train had left already.
Noise is unpleasant, ________ when you are trying to sleep.
—Was ________ problem solved? —We were trying to think of ________ way out, but it was difficult to find one.
The couple have decided to________buying a car until their economic condition becomes much better.
________Chinese culture with overseas cultures is a challenging job, but you will learn a lot from it.
You thought I was the boss? Whatever gave you that________?