In our class, when the bell rang and the
题型:选择题
问题:
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
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