Choose the Correct Verb to Agree in Number with the Subject

question 3

Multiple Choice

Choose the correct verb to agree in number with the subject of the following sentence. The number of paying subscribers __________ doubled in the past four years.

• A) ​has
• B) have​

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Definitions:

Nitrate

A compound containing nitrogen and oxygen, commonly found in fertilizers, and can lead to environmental concerns such as water pollution and eutrophication when present in high levels.

Phosphate

A salt or ester of phosphoric acid, commonly used in fertilizers, detergents, food additives, and for water treatment.

Degradable Wastes

Wastes that can break down into less harmful components over time through biological processes.

Dissolved Oxygen

The amount of oxygen gas dissolved in water, essential for the respiration of aquatic life.