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 from 12 to 14.

Physics and mental exercise has been found to be beneficial for our brains, but scientists have now found it could also improve the learning ability of our children. 

A. Physics 

B. has been 

C. it 

D. learning ability 

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.

A cure for the common cold, causing by a virus, has not been found

A. for

B. causing

C. a virus

D. has not been 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.

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 B on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The effects of cigarette (A) smoke has (B) been proven to be (C) extremely (D) harmful.

A. cigarette 

B. has 

C. to be

D. extremely 

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

(A) The effects of (B) cigarette smoking (C) has been proven to be (D) extremely harmful.

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 lion has l o n g   b e e n a s y m b o l of s t r e n g t h ,   p o w e r f u l and cruelty

A. long been

B. symbol

C. strength

D. powerful

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.

Chemical engineering is based on the principles of physics, chemists, and mathematics.

A. on

B. principles

C. chemists

D. mathematics

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

A lot of discoveries have made in the fields of chemistry and physics

A. a lot of

B. have made

C. in

D. fields 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.

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