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

Humans have done great advances in technology at the expense of the environment.

A. at the expense 

B. Humans 

C. have done 

D. advances

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.
Humans  have done great advances in technology at the expense of the environment.

A.have done

B. at the expense

C. advances

D. humans

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.

Economics (A) have been developed (B) rapidly (C) since (D) the last few years.

A. Economics

B. have been developed 

C. rapidly 

D. since

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 improvement (A) for water standards (B) over (C) the last 50 years has been (D) very great.

A. for water

B. over 

C. the last

D. very great.

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.

Cameras (A) of one type or another(B)  have been using(C)   for more than a hundred(D) years.

A. Cameras 

B. another

C. using

D. hundred

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.

Despite (A) the recent industrial revolution, all the forms of traditional (B) craft has been (C) preserved in that (D) museum.

A. Despite 

B. traditional 

C. has been

D. in that

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

The number of (A) the homeless people in Nepal have (B) increased sharply due to (C) the recent severe earthquake.(D) 

A. of

B. have

C. due to

D. severe earthquake