Three years (is/are) a long time to spend away from your friends and family.
is
Aron, together with his wife (are greeting/greets) the guests of the party.
greets
The truthful (are/is) always trustworthy.
are
A large number of voters still (vote/votes) along straight-party lines.
vote
Everything (works/will work) fine when it’s done correctly.
works
One of my sisters (is/are) going on a trip to France.
is
Carlos is the only one of those students who (have/has) lived up to the potential described in the yearbook.
has
There (are/is) more calories in a bowl of chocolate-brocoli breakfast cereal than you might think.
are
The jury (were/was) not convinced.
was