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. 

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

A. learning ability 

B. has been 

C. it 

D. Physics 

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.

The assumption that smoking has bad effects on our health have proved.

A. that 

B. effects 

C. on 

D. have proved 

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.

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.

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 from 12 to 14.

My girlfriend and I drink sometimes coffee in the morning in a café near my school.

A. girlfriend 

B. drink sometimes 

C. in 

D. near my school 

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