Either of us (are, is) a good choice for the math team.  

is

One of my friends (plant, plants) vegetables in her back garden.

plants

No one ever (believes, believe) what I say.

believes

Everyone in my family (eat, eats) tomatoes.

eat

Some of my cousins (play, plays) musical instruments.

play

All of my classmates (do, does) their homework.

does

No one in my family ever (complain, complains).

complains

The moon in the night sky (is, are) a beautiful sight.

is

Tides on the Earth (rise, rises) because of the Moon's gravitational pull.

rise

The marching band (play, plays) at every football game.

plays

Each (has, have) their own way of doing things.

have

The boss (wants, want) to hire a new employee.

wants

Mumps (is, are) a contagious disease.

is

That is my (reason, reasons) for leaving so suddenly.

reason

The (child, children) wears heavy coats in the winter.

child