Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
Trả lời câu hỏi dưới đây:
We offer a speedy and secure service of transferring money in less than 24 hours.
secure = đảm bảo
A. không để ý
B. không chắc chắn
C. chậm
D. mở