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.

Vaccines are one of the most important measures of prevention medicine to protect the population from diseases and infections.

A. measures

B. are 

C. prevention

D. infectious

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.

Vaccines are one of the most important measures of prevention medicine to protect the population from diseases and infections.

A. are

B. measures

C. prevention

D. infections

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 exam to (A) become a lawyer is (B) on far the (C) most difficult he (D) has taken

A. become

B. on

C. most

D. has

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 exam to (A) become a lawyer is (B) on far the (C) most difficult he (D) has taken.

A. become

B. on

C. most 

D. has

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.

It (A) has been said (B) that laser (C) to be the most miraculous (D) to cure the disease.

A. has been said 

B. that 

C. to be

D. to cure

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.

One of the features of London is the number of big stores, most of them are to be found in or near the West End.

A.One of the features 

B.number

C.most of them

D.to be found

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.

One of the features of London is the number of big stores, most of them are to be found in or near the West End.

A. One of the features     

B. number    

C. most of them     

D. to be found