______ tourism developing, more and more people prefer to go travelling for a holiday.
________ big or small countries, we will make friends with anybody who admits that there is only one China.
The research project has only been ______ for three months, so it’s too early to comment on its success.
A night in a hotel in Shanghai costs ______ a week in some faraway cities.
---Are you going to Tom’s birthday party?---_________.I might have to work.
______ expense, we must take every measure to save the old man’s life.