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