The officer ordered that the delivering ordinance commence.

a. The officer ordered that the bombing commence.
b. The officer ordered his troops to be on the defensive.
16 Answer: B
Which sentence is closest in meaning to:
The driveway was overlain by impervious surfaces.
a. The driveway was completely covered by snow and ice.
b. The driveway was paved.
17 Answer: A
Which sentence is closest in meaning to:
The companies were required to produce automobiles with lower noise-
emission characteristics.
a. The companies were required to produced quieter automobiles.
b. The companies were required to produce more fuel-efficient cars.
18 Answer: A
Which sentence is closest in meaning to:
Make sure that you transfer waste products to appropriate receptacles in
these environs.
a. Put your trash in the nearest trash can.
b. Take the aluminum cans to the nearest recycling center.
20 Answer: B
Which sentence is closest in meaning to:
The air head was fired.
a. The head of the aviation board was fired.
b. A not-so-bright staff member was fired.

It helps to put the question number at the beginning of the question.

16 A
17 B
18 A
20 A
21 B

Answer: B

Answer: B

To find the closest sentence in meaning to "The air head was fired," we need to look for a sentence that conveys the idea of someone being fired, especially someone who is not very bright.

Sentence b, "A not-so-bright staff member was fired," is the closest in meaning to the given sentence. It captures the notion of someone being dismissed from their position, and implies that this person was not very intelligent or competent.

To arrive at this answer, I analyzed the context and similar phrases. "Air head" is a term used to describe someone who is foolish or lacking intelligence, and can be synonymous with the phrase "not-so-bright." So, by understanding the meaning of "air head" and the phrase "was fired," we can determine that sentence b is the closest in meaning.