TOEFL Practice Online Test
The Gulf of Mexico has produced _____ as well as dark-shaded pearls that have a metallic gloss.
_____ different species of birds can be gained through the use of binoculars.
After the wine is clarified, it _____ in wooden kegs or stainless steel tanks to age.
Shortening the travel distance between the Atlantic and Pacific Ocean by more than 7800 miles, the Panama Canal is ______ canal in the world.
Like the most ______ insects, common flies have two compound eyes, consisting of many six-sided lenses.
Mary McLeod Bethune, a leading African-American _____, as a child attended the local free school.
The noun "educator" is needed to modify the adjective " a leading African-American."
Proved to be without air and water, Mercury sequentially freezes and bakes ______ the sun.
______ the Silurian Period, there was significant radiation of rapacious fish equipped with bulky jaws.
A time preposition is needed here. Although all the choices deal with time, only "during" is the correct answer; it emphasizes a point in time.
Amphibians thrive in humid areas, nevertheless, their habitats are constantly decreased __________ new construction.
John B. Anderson, a congressman, became eminent for his liberal stance on debatable issues _____ an independent candidate for President of the United States in 1980.
Sprinkler irrigation systems are restricted to places ______ sufficient quantities of energy exist.
Sickle-cell anemia, which is a genetic defect, is caused by ____ that encourages a faulty form of hemoglobin.
This question is based on the correct word order. Only (B) has the right order.
The majority of bebop musicians employed a technical treatment ______ them to play a long, astonishing musical phrases with various notes.
______ the features of a character, cartoonist may convey political comments and editorial opinions in various publication and motion pictures.
After a rainfall in the desert, the water _____ in the playas either vaporizes or trickles down into the earth.
Carl Sandburg he elicited controversy with his candid, realistic free verse.
Beryllium is used as a bonding agent for nuclear fuel elements ____ toughness and excellent resistance to heat.
"Because of "is a preposition that is followed by a noun object; it is used to show a reason.
______ aluminum is exposed to oxygen, a tough, invisible oxide forms, making it extremely corrosion-resistant.
"Once" is used in an adverb clause to show time relationship. The meaning of "once" is similar to "when."
On the Welland Canal of the St. Lawrence, the locks are set in pairs, letting vessels move both up or down the water concurrently.
The Blue Mountains in Washington are neither as tall not as rocky as the Cascades.
By examining what the prehistoric people left behind, scientists are able to tell us ______.
The pancreas's ______ of insulin impairs the body's ability to use up and preserve sugar.
The most gignatic planet of the solar system, Jupiter is about 11 times as larger as Earth.
ROM is a chip memory whose contents are permanently stored in a computer and it cannot be altered by any user.
Natural rubber is an exceptionally useful raw material because it retains air, keeps out moisture, and does not ______ electricity.
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