Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questionsZika virus, transmitted mainly through the bite of an infected Aedes mosquito, can be avoided by __________away from this mosquito and living in good sanitary
A. staying
B. stayed
C. having stayed
D. to stay
Đáp án là A
Sau giới từ (“by”), dùng động từ ở dạng V-ing
To stay away from smb/smt = tránh xa khỏi ai/cái gì