Tricky Subject Verb Agreement

One of those disasters that often occurs/occur only in movies happened just as I got off the plane.

• occurs
• occur

The first author as well as the last two authors has/have approved the proofs.

• has
• have

Getting my paper accepted in Cell and seeing it in the finished journal was/were the highlight of my career.

• was
• were

Either the children or the parent has/have to give in.

• has
• have

Not only the previously published papers but also the one under review were/was called into question.

• were
• was

More than one of the authors has/have received the Nobel Prize.

• has
• have

Ten dollars is/are not enough to get me to jump in the Atlantic Ocean in February

• is
• are

Boston, and all New England cities, tend/tends to get snow in January

• tend
• tends

Each of the editors want/wants to accept the paper.

• want
• wants

A number of authors are/is at the conference.

• are
• is