Read the sentence.

Question

Sean or Stacey (knows, know) when shuttles or other space vehicles (is, are) launched.

Which pair of verbs correctly completes the sentence?

knows; are

know; is

know; are

knows; is

Answer 1

The correct pair of verbs to complete the sentence is:

knows; are

So the full sentence would read: "Sean or Stacey knows when shuttles or other space vehicles are launched."

Here's the reasoning:

• When using "or" to connect subjects, the verb agrees with the closer subject in a compound subject. In this case, "Stacey" is the closer subject to the verb "knows."
• "Shuttles or other space vehicles" is a plural subject, so the correct form of the verb is "are."