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 was not until (A) the late 1970s when (B) these country people could enjoy (C) the benefits (D) of electricity.

A. not until

B. when

C. these country people could enjoy

D. benefits

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 was not until (A) the late 1970s when (B) these country people could enjoy (C) the benefits (D) of electricity.

A. not until

B. when

C. these country people could enjoy

D. benefits

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

It was not until she could read and write when she was allowed to use smartphone.

A. not until

B. when

C. allowed

D. use

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 was not until the end of prehistoric  times that the first wheeled vehicles appearing .

A. until the end

B. prehistoric

C. the first

D. appearing

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.

The University of Kentucky has held this prestigious title until 1989, when it was granted to the University of Georgia.

A. was granted

B. it

C. has held

D. to