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.
Some methods to prevent soil erosion are plowing parallel with the slope of hills, to plant trees on unproductive land, and rotating crops.

A. Some

B. to prevent

C. are

D. to plant

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

Technology is define as the tools, skills, and methods that are necessary to produce goods

A. is define

B.  the tools

C. that are

D. to produce

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.

Technology is define as the tools, skills, and methods that are necessary to produce goods.

A. is define

B. the tools

C. that are

D. to produce

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.

Unless we prevent local people to reach the scene, they are likely to interfere with our job.

A. likely 

B. to reach 

C. with 

D. Unless

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.

What we know about certain diseases are still not sufficient to prevent them from spreading easily among the population

A. What we know about

B. are

C. from spreading

D. among