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.

Passengers are required to arrive to the gate fifteen minutes before departure time. 

A. are required

B. arrive to

C. before

D. departure time

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 the each of following questions

People who had already bought tickets were instructed to go to gate first straightaway

A. People

B. had already bought

C. first

D. straightaway

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.

Those who had already purchased tickets were instructed to go to gate first immediately.

A. Those

B. had already purchased

C. first

D. immediately.

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

Those who had already purchased tickets were instructed to go to gate first immediately

A. Those

B.had already purchased

C. first

D. immediately

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