Question

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) What we know about certain diseases (B) are still not sufficient to prevent them (C) from spreading easily (D) among the population

A. What we know about

B. are

C. from

D. among

Answer 1

Đáp án A
Chủ ngữ là What we know about: động từ chia ngôi ba số ít