There … economies since the dawn of civilisation, but as a field of study, economics … only recently?

There … economies since the dawn of civilisation, but as a field of study, economics … only recently?

  1. )were / was developing
  2. have been / has developed
  3. are / has been developing
  4. were / is developing
  5. have been / develops

Jawaban: B. have been / has developed.

Dilansir dari Ensiklopedia, there … economies since the dawn of civilisation, but as a field of study, economics … only recently have been / has developed.

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