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 45 to 47.

When a pearl is cut in half and examined under a microscope, but its layers can be seen.

A. a microscope

B. be seen

C. but its

D. is cut

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 45 to 47.

When a pearl is cut in half and examined under a microscope, but its layers can be seen.

A. a microscope 

B. be seen 

C. but its 

D. is cut 

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 45 to 47

When a pearl is cut in half and examined under a microscope, but its layers can be seen.

A. a microscope

B. be seen

C. but its

D. is cut

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 from 45 to 47.

The plant leaf has vascular tissues just as the stem and the root does.

A. does 

B. just as

C. stem

D. leaf

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