I. Reduce the following relative clauses or change to-infinitive or Participle phrases into relative clauses 2. Archaeologists have discovered signs of human activity that dates back almost 30,000 years cho mình xin lý thuyết để làm ạ
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Archaeologists have discovered signs of human activity dating back almost 30,000 years.
Archaeologists have discovered signs of human activity that dates back almost 30,000 years.
=> Archaeologists have discovered signs of human activity dating back almost 30,000 years.
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