Trường THPT Chuyên Lam Sơn lần 1

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 _____ by early immunization.

A. can be prevented

B. be prevented

C. can prevent

D. are preventing

Đề thi liên quan

Trường THPT Chuyên Lam Sơn lần 1

50 câu hỏi | 1,008 lượt thi | 60 phút