Which sentence is correct?

Question

The sidewalks in the courtyards has been decorated with chalk.

The cars in the parking lot belongs to the teachers.

The surface of the parking lots were redone this summer.

The bike on the bike rack is blue.

Answer 1

The correct sentence is:

The bike on the bike rack is blue.

The other sentences contain subject-verb agreement errors:

1. "The sidewalks in the courtyards has been decorated with chalk." → should be "have" instead of "has."
2. "The cars in the parking lot belongs to the teachers." → should be "belong" instead of "belongs."
3. "The surface of the parking lots were redone this summer." → should be "was" instead of "were."