Two songs stick out when you think of Susan Jacks and Terry Jacks. The first, at least to me is “Which Way You Going Billy?” and the second is “Seasons in The Sun”. The first is from the album of the same name, while the second is from Terry’s album after leaving the group.
Here from 1971 is The Poppy Family with “I was wondering”. It’s from the album, Poppy Seeds from . It peaked at #100 in the US and at #27 in Canada.