A (A) basic knowledge of social studies, such as (B) history and geography, (C) are

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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 (A) basic knowledge of social studies, such as (B) history and geography, (C) are considered a basic part of the education of every (D) child.

basic

history

are

child

Giải thích

Đáp án : C

“are” -> “is”

Chủ ngữ trong câu là A basic knowledge – số ít nên động từ to be phù hợp nhất là is