Error Spotting - Subject Verb — Set 9

The government has taken steps to improve the infrastructure.

What are the list of things that needs to be done?

The congregation were singing hymns with great enthusiasm.

Either the red car or the blue cars is parked in front of the house.

The species of birds in this region are migratory during winter.

The number of students attending the seminar have increased.

Neither the witnesses nor the suspect was able to explain the incident.

Either of the restaurants serve good quality food.

There is a cat and two dogs waiting at the door.

Each girl and each boy are required to wear uniforms.