题目内容
The students were studying in classroom when, all of sudden,the lights went out.
A.不填;不填 B.a;the C.the;a D.the;不填
A
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题目内容
The students were studying in classroom when, all of sudden,the lights went out.
A.不填;不填 B.a;the C.the;a D.the;不填
A