Pronoun Agreement

In recent years, new forms of digital technology have allowed acoustic engineers to create sophisticated noise-filtering devices. As a result, ___ can now eliminate unwanted noise with a precision never before possible.

• it

• they

• he or she

• this

Elizabeth Barrett Browning's "Cry of the Children," published in 1842, denounced the use of child labor. The poem also brought about some of the first labor laws designed to prevent ___.

• them.

• those.

• some.

• that practice.

When people dream, their eyes move in accordance with the action. If someone is dreaming about watching a game of tennis, for example, ___ from left to right with each volley.

• his or her

• one's

• our

• your

Jazz musician Miles Dewey Davis Ill was known for creating a unique sound through the use of non- traditional instruments such as the French horn. He joined Ella Fitzgerald and Duke Ellington as ___ of the most renowned jazz performers in the United States during the mid-twentieth century.

• many

• some

• one

• more

Although people who sleep in the middle of the day are often perceived as lazy, they are actually a remarkably accomplished group. Winston Churchill, John F. Kennedy, Napoleon, Albert Einstein, and Thomas Edison were all ___ known for valuing their afternoon rest.

• a famous napper

• a famous, napper

• famous nappers;

• famous nappers,

Many runners, even those ___ train regularly, have a tendency to stick to an established distance. As a result, they never develop a clear sense of their athletic potential.

• whom

• who

• which

• they

There are around 300 octopus species, all of which are part of an elite group of marine creatures with remarkably large brains. Scientists have found that octopuses can not only navigate their way through mazes, but also solve problems quickly and remember ___

• it.

• this.

• that.

• information.

The ENIAC, a precursor to the modern computer developed in the 1940s, was capable of adding more than 5,000 numbers per second. Occupying the space of a room, the machine contained dozens of panels, ___ own unique function.

• each with its

• each with their

• each of them had its

• each of which had their

In 1858, Frederick Law Olmsted and Calvert Vaux won a commission to redesign Manhattan's Central Park, which at that time lacked ways for pedestrians and carriages to navigate the park without disturbing one another. ___ began work later that year.

• It

• He

• They

• Some

Many of the largest deserts, including the Gobi Desert and the Patagonian Desert, are located in the shadows of immense mountain ranges that block moisture from nearby bodies of water. For example, the Himalayan peaks surrounding ___ are so high that clouds cannot rise high enough to cross them.

• it

• this

• that one

• the Gobi