Thenumberoftickets_____willbedeterminedbythesizeofthestadium.

Morewindpowerstationswill____________tomeetthedemandforcleanenergy.

—Let'stakeacoffeebreak.

—__________We'vebeenworkingforhours.

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.