He had to _______ paying the bills because of a lack of money.
All the teachers are well aware of the fact that most students, especially teens, need help and encouragement ______ punishment.
Now that you have accepted the task, the only thing you can do now is ______ on how to fulfill it.
Who ______ the fight against the H1N1 flu ______ it not been for the Chinese scientists’ great efforts?
Lots of coal miners died on the job last year, ______ the government to shut nearly 800 small mines in Shanxi Province alone.
— Mom, can you give me an extra 200 yuan a month?— Son, we have just bought a house, and from now on we need to practice strict ______.