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.(D)
A basic (A)knowledge of social studies, such as history(B) and geography, are (C)considered a basic part of the education of every child(D).
A. basic
B. history
C. are
D. child
A
“are” -> “is”
Chủ ngữ là A basic knowledge – số ít, nên động từ to be đúng là is