Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

Today, many serious childhood diseases can prevent by early immunization.

• A. A. many
• B. B. childhood
• C. C. can prevent
• D. D. early

diseases không thể tự prevent => động từ chia ở dạng bị động
Sửa: can prevent => can be prevented