2015年12月英语四级考试卷一听力题第16题答案
　　A.No one knows exactly where they were.
　　B.No one knows for sure when they came into being.
　　C.No one knows for what purpose they were.
　　D.No one knows what they will.

A.No
B.
C.No
D.
E.No
F.
G.No

【参考答案】

B.No one knows for sure when they came into being.
【解析】短......

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