问题
选择题
In our class, when the bell rang and the teacher came in, it was a _____ for every student to stand up. [ ]
A. signal
B. chance
C. sign
D. command
答案
答案：A
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In our class, when the bell rang and the teacher came in, it was a _____ for every student to stand up. [ ]
A. signal
B. chance
C. sign
D. command
答案：A