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The Earth is the only planet with a large number of oxygen in its atmosphere.

A. the

B. a large number

C. oxygen

D. its

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The earth is (A) the only planet with a large (B) number of (C) oxygen in (D) its atmosphere.

A. the

B. number

C. oxygen

D. its

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The earth is (A) the only planet with a large (B) number of (C) oxygen in (D) its atmosphere.

A. the 

B. number 

C. oxygen 

D. its

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Pure sodium immediately combines with oxygen when is exposed to air.

A. immediately

B. combines

C. is exposed

D. to air

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The nitrogen makes up over 78 percent of the Earth’s atmosphere, the gaseous mass surrounding the planet.

A. The nitrogen

B. over

C. percent of

D. surrounding

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Philosopher Theodore A. Langerman was interested in the fields of literary and music

A. Philosopher 

B. interested 

C. literary 

D. music

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There was a gradual raise in the number of literate males and females in the Lowlands.

A.in the Lowlands

B. was

C. raise

D. the number of

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Not surprisingly, poverty is a problem worth of concern in every country

A. surprisingly 

B. poverty 

C. worth 

D. every country

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Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Hardly he had graduated from Vietnam Naval Academy when he joined Vietnam Coast Guard.

A. he had    

B. graduated from  

C. when       

D. joined