TOEFL - Problems with Articles

On a trip down to the bottom of the Grand Canyon, the equipment will in all probability be carried by a burros.

• a trip

• the bottom

• the Grand Canyon

• a

Ford designed the first large-scale assembly line at plant in Highland Pak, Michigan.

• the first

• assembly line

• plant

• Highland Pak, Michigan

In the human body, blood flows from a heart through the arteries, and it returns through the veins.

• In the

• a heart

• the arteries

• the

The scholarship that Wilson received to study history at Cambridge presented an unique opportunity.

• The scholarship

• history

• Cambridge

• an

Observations from Earth indicate that at the solar surface, the outward magnetic field is a strongest at the polar regions.

• the

• the outward

• a

• the polar regions.

A radar images of Venus add details about a planet dominated by volcanoes and lava.

• A radar

• details

• a planet

• volcanoes and lava

In 1863 and 1864, the U.S. Congress passed the National Bank Acts, which set up a system of privately owned banks chartered by a federal government.

• the National Bank Acts

• a

• privately owned banks

• a federal government

An human ear responds to a wide range of frequencies.

• An

• ear

• a wide range

• frequencies

Bacteria that live in soil and water play a vital role in recycling carbon, nitrogen, sulfur, and another chemical elements used by living things.

• soil and water

• a vital role

• another

• living things

During the U.S. Civil War, an American balloonist organized a balloon corps in Army.

• the U.S.

• an American

• a balloon

• Army