A red flag was placed there ________ a ________ of danger.
A red flag was placed there ________ a ________ of danger.
A.as, view
B.like, signal
C.for, sight
D.as, sign
答案及解析： D
A red flag was placed there ________ a ________ of danger.
A.as, view
B.like, signal
C.for, sight
D.as, sign
答案及解析： D