2021銀行校園招聘考試：英語單選題（11）
In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.（ ）。
A. signal
B. chance
C. mark
D. measure
東吳教育參考答案解析
答案:A
解析：根據句意可知打鈴及老師合上書本，這是下課的暗示，選項中只能選擇signal。chance機會；mark分數，痕跡，measure方法，措施。
