TOEFL Skills 52-60

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

• a trip

• the bottom

• the Grand Canyon

• a

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

• that

• 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

An human ear responds to a wide range of frequencies.

• An

• a wide range

• 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 America

• a balloon

• Army

Amelia Earhart, the first woman to fly solo across the Atlantic, disappeared on June 1937 while attempting to fly around the world.

• the first

• across

• on

• around

Atomic nuclei are believed to be composed by protons and neutrons in equal numbers for the lighter elements.

• are

• to be

• by

• in

According legend, Betsy Ross designed and sewed the first American flag.

• According legend

• designed and sewed

• first

• flag