5. In our class, when the bell rang and
题型:选择题
问题:
5. In our class, when the bell rang and the taacher closed his book, it was a or everyone to stand up.
A.signal
B.chance
C.mark
D.measure
5. In our class, when the bell rang and the taacher closed his book, it was a or everyone to stand up.
A.signal
B.chance
C.mark
D.measure