Companies are struggling to find the right ________ between supply and demand, but it is no easy task.
It was never clearthe man hadn't reported the accident sooner.
In that school, English is compulsory for all students, but French and Russian are___
Between the two parts of the concert is an interval, ___the audience can buy ice-cream.
——Tommy is plannning to buy a car. ——I know. By next month, he ___enough for a used one.
The fact that so many people still smoke in public place ___that we may need nationwide campaign to raise awareness of the risks of smoking.