Which word completes the sentence: All Military airfields _____ are available to civil aircraft, without restriction, in the event of an emergency?

Which word completes the sentence: All Military airfields _____ are available to civil aircraft, without restriction, in the event of an emergency?

• A. is
• B. were
• C. are
• D. was

Answer: (C)

The main idea here is matching the verb to the subject in number and tense. "All Military airfields" is a plural subject, so the verb that follows should be the plural present form of “to be.” That form is “are.” Using any of the other options would either treat the subject as singular or place the action in the past, which doesn’t fit the current, general policy being stated. The sentence conveys a standing rule: all military airfields are available to civil aircraft in an emergency.

The main idea here is matching the verb to the subject in number and tense. "All Military airfields" is a plural subject, so the verb that follows should be the plural present form of “to be.” That form is “are.” Using any of the other options would either treat the subject as singular or place the action in the past, which doesn’t fit the current, general policy being stated. The sentence conveys a standing rule: all military airfields are available to civil aircraft in an emergency.