问题
选择题
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
答案
答案：A
搜题请搜索小程序“爱下问搜题”
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
答案：A