—____ you got to know I traveled to USA?—Through one of your colleagues.
We were in __________ when we left that we forgot the airline tickets.
All these gifts must be mailed immediately __________ on time for Christmas.
—I'm wondering why the visitors chose to stay with the local family. —__________ real local life.
__________ the project on time, the staff were working at weekends.
So difficult __________ it to work out the problem that I decided to ask Tom for advice.