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22、The custom _____ the 8th century when people knew little about the earth which they lived on.

A. is dated from                  B. goes back in time to          C. dates back to         D. dates to

22、C

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The custom _____ the 8th century when people knew little about the earth which they lived on.

A. is dated from                  B. goes back in time to          C. dates back to         D. dates to

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