Psychophysicist Howard Moskowitz was hired by a soda company to determine how much artificial sweetener____After conducting consumer taste tests, he found that no such ideal existed: participants expressed a wide range of preferences for different blends of sweetener, carbonization, and flavoring.

Which choice completes the text so that it conforms to the conventions of Standard English?

A)do most people prefer in a diet drink?

B) do most people prefer in a diet drink.

C) most people prefer in a diet drink.

D) most people prefer in a diet drink?

The life spans of rockfish vary greatly by species. For instance, the colorful calico rockfish (Sebastes dalli) can survive for a little over a____the rougheye rockfish (Sebastes aleutianus) boasts a maximum life span of about two centuries.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) decade, while

B) decade. While

C) decade; while 

D) decade: while

In her book The Woman Warrior: Memoirs of a Girlhood Among Ghosts, author Maxine Hong Kingston examines themes____childhood, womanhood, and Chinese American identity by intertwining autobiography and mythology.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) of:

B) of,

C) of-

D) of

Human-made (synthetic) fibers used in clothes and many other consumer products are more durable than most natural plant____the manufacture of synthetic fibers requires toxic chemical solvents that can pollute air and water.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) fibers but

B) fibers, but

C) fibers

D) fibers,

Winding through the ice atop Norway’s Jotunheim Mountains is the Lendbreen pass, an ancient route that was used by hunters, farmers, traders, and travelers in the Middle Ages before eventually falling into disuse. Recently, archeologists have____knives, horseshoes, wool tunics, and thousands of other artifacts from the icy pass.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) unearthed

B) unearthed:

C) unearthed,

D) unearthed-

The fine, powdery substance that covers the Moon’s surface is called regolith. Because regolith is both readily available and high in oxygen____scientists have wondered whether it could be used as a potential source of oxygen for future lunar settlements.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) content and

B) content,

C) content

D) content, and

Typically, underlines, scribbles, and notes left in the margins by a former owner lower a book’s____when the former owner is a famous poet like Walt Whitman, such markings, known as marginalia, can be a gold mine to literary scholars.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) value but

B) value

C) value, but

D) value,

Polyphenols are organic compounds____among their many roles, provide pigment that helps protect plants against ultraviolet radiation from sunlight.

Which choice completes the text so that it conforms to the conventions of Standard English?

A)that-

B) that;

C) that:

D) that,

According to Naomi Nakayama of the University of Edinburgh, seeds from a dying dandelion appear to float in the air while____because their porous plumes enhance drag. This allows the seeds to stay airborne long enough for the wind to disperse them throughout the surrounding area.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) falling

B) falling;

C) falling:

D) falling,

Generations of mystery and horror____have been influenced by the dark, gothic stories of celebrated American author Edgar Allan Poe (1809–1849).

Which choice completes the text so that it conforms to the conventions of Standard English?

A) writers,

B) writers

C) writers-

D) writers;