The students were studying in _____ clas
题型：选择题
问题：
The students were studying in _____ classroom when,all of _____ sudden,the lights went out. [ ]
A./;/
B.a;the
C.the;a
D.the;/
The students were studying in _____ classroom when,all of _____ sudden,the lights went out. [ ]
A./;/
B.a;the
C.the;a
D.the;/