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     Scientistsestimatethatplantsandanimalslived

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     Scientistsestimatethatplantsandanimalslived

      Scientists estimate that plants and animals lived _____ 3.5 billion years ago.

A. as far as                   B. as many as               C. as long as                 D. as old as

【回答】

C

知识点:词组 短语

题型:选择题

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