問題詳情
5. What is the meaning of “prolonged blast”?
(A) A blast of about one second’s duration.
(B) A blast of from two to three second’s duration.
(C) A blast of from four to six second’s duration.
(D) A blast of from eight to ten second’s duration.
參考答案
答案：C
難度：困難0.333
書單：沒有書單，新增