trenadi7730 trenadi7730
  • 18-01-2018
  • Biology
contestada

Current temperature increases on earth​ __________ a signal that humans should change their behavior.
a. had been
b. were
c. are
d. will be

Respuesta :

samanthamasood
samanthamasood samanthamasood
  • 18-01-2018
the answer to the question is c. ARE
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