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

Câu hỏi

Today, many serious childhood diseases _____ by early immunization.

A. prevent

B. can prevent

C. are preventing

D. can be prevented

Đáp án
D. can be prevented

Câu hỏi thuộc Bài tập:

E9- Vào 10- Đề ôn 27