Traffic is heavy and the price of oil is much ______so that many people go to work by bus instead.

China needs to strike a balance between maintaining a _______ fast and stable development and making economic structural adjustment.

William found it increasingly difficult to read，for his eyesight was beginning to . [ ]

ering your salary, you should ________ at least 100 dollars a week.

Sorry. I didn’t break the plate______.—It’s OK. Don’t worry about it.