Explanation:
Theo Anh (Chị), tại sao nói An ninh hàng không
được xem là yếu tố sống còn ? Đảm bảo an ninh hàng không là gì ?
Answer:
D
Explanation:
idk but I'm pretty sure it's D
"Has" would make more sense. A tip would be to read the sentence with both words, one word at a time obviously (So Everyone HAS already voted in the election.) and just go with your gut on which one makes more sense, you can do it!
