Circle the Correct Form of the Verb That Agrees with the Subject

Short Answer

Circle the correct form of the verb that agrees with the subject.
a. The suspects (is, are) fleeing on foot.
b. Either his cats or her dog (is, are) responsible for the property damage.
c. One of the sisters (is, are) sending threats to the neighbor.
d. Every one of the employees (know, knows) who stole cash from the drawer.