TOEFL EXERCISE (Skills 5-6)

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TOEFL EXERCISE (Skills 5-6): Choose the letter of the word or group of words that best completes the sentence.

1.      A spacecraft is freed from friction ____ launched into space.
a)      It
b)      It is
c)      After is
d)      After it is
Analysis:                             
This question is a type of Adverb Clause Connectors.
Spacecraft, it is used as a noun: a vehicle used for traveling in space.
Freed it is used as a verb: release from captivity, confinement, or slavery.
Friction it is used as a noun: the resistance that one surface or object encounters when moving over another.
Launched it is used as a verb: start or set in motion (an activity or enterprise).  

2.      ____ with their surroundings, or they hide in crevices for protection.
a)      Lobsters
b)      Lobsters blend
c)      Lobsters blending
d)      Because lobsters blend
Analysis:
This question is a type of Adverb Clause Connectors.
Surroundings it is used as an adjective: be all around (someone or something).
Crevices it is used as a noun: a narrow opening or fissure, especially in a rock or wall.

3.      ____ a ball-and-socket joint, the elbow is a simple hinge joint.
a)      While the shoulder
b)      While the shoulder is
c)      The shoulder is
d)      The shoulder
Analysis:
This question is a type of Adverb Clause Connectors.                                    
Ball-and-socket it is used as a noun: a natural or manufactured joint or couplings, such as the hip joint, in which a partially spherical end lies in a socket, allowing multidirectional movement and rotation.

4.      A car has several sections with moving parts, ____ of those parts is essentials.
a)      Good lubrication
b)      Well lubricated
c)      And good lubrication
d)      And well lubricated
Analysis:
This question is a type of Coordinate Connectors.

5.      Bears can’t see well ____ small eyes.
a)      Bears have
b)      Because having
c)      Because they have
d)      Because of bears
Analysis:
This question is a type of Adverb Clause Connectors.

6.      ____ at the Isthmus of Panama, so animals were able to migrate between North and South America.
a)      A land bridge existed
b)      When a land bridge existed
c)      A land bridge
d)      With a land bridge
Analysis:                   
This question is a type of Coordinate Connectors.
At: when we can use "at "in a sentence? We can use "at" if someone is in a particular place.
Example:
·         She is at the bus stop.
·         I am at home.

7.      ____ mostly made of granite, it also contains some human-made.
a)      The Empire State Building
b)      The Empire State Building is
c)      Although the Empire State Building is
d)      Although the Empire State Building is built
Analysis:
This question is a type of Adverb Clause Connectors.

8.      Pressure differences make the eardrum vibrate ____ the ear.
a)      Enters the sound waves
b)      As sound waves
c)      Sound waves enter
d)      As sound waves enter
Analysis:         
This question is a type of Adverb Clause Connectors.

9.   An optical microscope magnifies as much as 2,000 times, but an electron microscope ____ as much as a million times.
a)      Magnifying 
a)      It magnifies
b)      Can magnify
c)      Magnify it
Analysis:
This question is a type of Coordinate Connectors.

10.      If scientific estimates are accurate, ____ with the Earth about 20,000 years ago.
a)      The Canon Diablo meteorite collided
b)      The collision of the Canon Diablo meteorite
c)      The Canon Diablo meteorite colliding
d)      Colliding the Canon Diablo meteorite
Analysis:
This question is a type of Adverb Clause Connectors.


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