The number of tickets _____ will be determined by the size of the stadium.

The fact that so many people still smoke in public place _______that we may need antionwide campaign to raise awareness of the riks of smoking.

The old lady can't hope to _____ her cold in a few days.

__________ the convenience of digital payment, many senior citizens started to use smart phones.

In that school, English is compulsory for all students, but French and Russian are _________.