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.

The (A) average salt (B) content of seawater is (C) more than three (D) percents.

A. average 

B. content 

C. more than 

D. percent

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.

The (A) average salt (B) content of seawater is (C) more than three (D) percents

A. average

B. content 

C. more than 

D. percents 

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.

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

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.

Geothermal energy is energy to obtain by using heat from the Earth's interior.

A. energy

B. to obtain

C. using

D. the Earth's

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.

The world is becoming more (A) industrialized and the number of animal (B) species that have becoming (C) extinct (D) have increased. Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions

A.  industrialized

B. species

C. extinct

D. have

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.

The economy of Maine is based to a great extent in its forest, which over 80 percent of its surface area.

A. economy of

B. to a

C. in its

D. percent of

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.

The economy of Maine is based to a great extent in its forest, which over 80 percent of its surface area.

A. economy of     

B. to a         

C. in its       

D. percent of

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.

The (A) economy of this country is based (B) to a great extent (C) in its forests, which cover 80 (D) percent of its surface area.

A. economy 

B. to 

C. in its 

D. percent of