music: 70's Chart Toppers: Name The Artist: An Everlasting Love?

Questions

Cleveland four u.s presidents have served entire terms without having a ______?

Close encounters of the first kind?

Closely related to pascal, niklaus wirth also played a part in what computer language's creation?

Coal is sometimes added to softdrinks to make them ______?

Coca-cola was named for the extracts of which of its two 'medicinal' ingredients?